diff --git a/cpp/include/cudf/ast/detail/expression_evaluator.cuh b/cpp/include/cudf/ast/detail/expression_evaluator.cuh
index 8f0c3a8bad64..513f49dca23e 100644
--- a/cpp/include/cudf/ast/detail/expression_evaluator.cuh
+++ b/cpp/include/cudf/ast/detail/expression_evaluator.cuh
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2021-2025, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2021-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 #pragma once
@@ -232,9 +232,6 @@ struct expression_evaluator {
    * @param left View of the left table view used for evaluation.
    * @param right View of the right table view used for evaluation.
    * @param plan The collection of device references representing the expression to evaluate.
-   * @param thread_intermediate_storage Pointer to this thread's portion of shared memory for
-   * storing intermediates.
-
    */
   __device__ inline expression_evaluator(table_device_view const& left,
                                          table_device_view const& right,
@@ -248,8 +245,6 @@ struct expression_evaluator {
    *
    * @param table View of the table view used for evaluation.
    * @param plan The collection of device references representing the expression to evaluate.
-   * @param thread_intermediate_storage Pointer to this thread's portion of shared memory for
-   * storing intermediates.
    */
   __device__ inline expression_evaluator(table_device_view const& table,
                                          expression_device_view const& plan)
@@ -266,8 +261,10 @@ struct expression_evaluator {
    *
    * @tparam Element Type of element to return.
    * @tparam has_nulls Whether or not the result data is nullable.
-   * @param device_data_reference Data reference to resolve.
-   * @param row_index Row index of data column.
+   * @param input_reference Data reference to resolve.
+   * @param thread_intermediate_storage Thread-local storage for intermediate expression results.
+   * @param left_row_index Row index into the left table.
+   * @param right_row_index Row index into the right table.
    * @return Element The type- and null-resolved data.
    */
   template <typename Element, CUDF_ENABLE_IF(column_device_view::has_element_accessor<Element>())>
@@ -462,6 +459,7 @@ struct expression_evaluator {
    *
    * @param output_object The container that data will be inserted into.
    * @param row_index Row index of all input and output data column(s).
+   * @param thread_intermediate_storage Thread-local storage for intermediate expression results
    */
   template <typename ResultSubclass, typename T, bool result_has_nulls>
   __device__ __forceinline__ void evaluate(
@@ -483,6 +481,7 @@ struct expression_evaluator {
    * @param left_row_index The row to pull the data from the left table.
    * @param right_row_index The row to pull the data from the right table.
    * @param output_row_index The row in the output to insert the result.
+   * @param thread_intermediate_storage Thread-local storage for intermediate expression results
    */
   template <typename ResultSubclass, typename T, bool result_has_nulls>
   __device__ __forceinline__ void evaluate(
@@ -592,6 +591,7 @@ struct expression_evaluator {
      * @param output_object The container that data will be inserted into.
      * @param device_data_reference Data reference to resolve.
      * @param row_index Row index of data column.
+     * @param thread_intermediate_storage Thread-local storage for intermediate expression results
      * @param result Value to assign to output.
      */
     template <typename Element,
diff --git a/cpp/include/cudf/ast/detail/expression_parser.hpp b/cpp/include/cudf/ast/detail/expression_parser.hpp
index 18d6b5954100..ef646c1571b4 100644
--- a/cpp/include/cudf/ast/detail/expression_parser.hpp
+++ b/cpp/include/cudf/ast/detail/expression_parser.hpp
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2020-2025, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2020-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 #pragma once
@@ -98,6 +98,9 @@ class expression_parser {
    * @param expr The expression to create an evaluable expression_parser for.
    * @param left The left table used for evaluating the abstract syntax tree.
    * @param right The right table used for evaluating the abstract syntax tree.
+   * @param has_nulls Whether any of the input columns contain nulls
+   * @param stream CUDA stream used for device memory operations and kernel launches
+   * @param mr Device memory resource used to allocate the returned device memory
    */
   expression_parser(expression const& expr,
                     cudf::table_view const& left,
@@ -111,6 +114,9 @@ class expression_parser {
    *
    * @param expr The expression to create an evaluable expression_parser for.
    * @param table The table used for evaluating the abstract syntax tree.
+   * @param has_nulls Whether any of the input columns contain nulls
+   * @param stream CUDA stream used for device memory operations and kernel launches
+   * @param mr Device memory resource used to allocate the returned device memory
    */
   expression_parser(expression const& expr,
                     cudf::table_view const& table,
diff --git a/cpp/include/cudf/detail/algorithms/reduce.cuh b/cpp/include/cudf/detail/algorithms/reduce.cuh
index bacdac203920..3f81875bf629 100644
--- a/cpp/include/cudf/detail/algorithms/reduce.cuh
+++ b/cpp/include/cudf/detail/algorithms/reduce.cuh
@@ -32,7 +32,7 @@ namespace cudf::detail {
  * @param begin Device-accessible iterator to start of input values
  * @param end Device-accessible iterator to end of input values
  * @param init Initial value for the reduction
- * @param op Binary reduction operator
+ * @param binary_op Binary reduction operator
  * @param stream CUDA stream to use
  * @return The reduction result
  */
@@ -309,7 +309,6 @@ bool any_of(InputIterator begin, InputIterator end, TransformOp op, rmm::cuda_st
  *
  * @param begin Device-accessible iterator to start of input values
  * @param end Device-accessible iterator to end of input values
- * @param init Initial value (unused, for API compatibility)
  * @param op Predicate operator to apply to each element
  * @param stream CUDA stream to use
  * @return true if the predicate is false for all elements, false otherwise
diff --git a/cpp/include/cudf/detail/copy_if_else.cuh b/cpp/include/cudf/detail/copy_if_else.cuh
index 113ec61a7b83..b39bb3860e04 100644
--- a/cpp/include/cudf/detail/copy_if_else.cuh
+++ b/cpp/include/cudf/detail/copy_if_else.cuh
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2019-2025, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2019-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 
@@ -130,7 +130,7 @@ __launch_bounds__(block_size) CUDF_KERNEL
  * @param rhs         Begin iterator of rhs range
  * @param filter      Function of type `FilterFn` which determines for index `i` where to get the
  *                    corresponding output value from
- * @param out_type    `cudf::data_type` of the returned column
+ * @param output_type `cudf::data_type` of the returned column
  * @param stream      CUDA stream used for device memory operations and kernel launches.
  * @param mr          Device memory resource used to allocate the returned column's device memory
  * @return            A new column that contains the values from either `lhs` or `rhs` as determined
diff --git a/cpp/include/cudf/detail/gather.hpp b/cpp/include/cudf/detail/gather.hpp
index 2b6a8f5e5e16..5fefe1a42693 100644
--- a/cpp/include/cudf/detail/gather.hpp
+++ b/cpp/include/cudf/detail/gather.hpp
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2019-2024, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2019-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 #pragma once
@@ -46,7 +46,7 @@ enum class negative_index_policy : bool { ALLOWED, NOT_ALLOWED };
  * performance, use `DONT_CHECK` when the `gather_map` is known to contain only valid
  * indices. If `policy` is set to `DONT_CHECK` and there are out-of-bounds indices in `gather_map`,
  * the behavior is undefined.
- * @param[in] negative_index_policy Interpret each negative index `i` in the
+ * @param[in] neg_indices Interpret each negative index `i` in the
  * `gather_map` as the positive index `i+num_source_rows`.
  * @param[in] stream CUDA stream used for device memory operations and kernel launches.
  * @param[in] mr Device memory resource used to allocate the returned table's device memory
diff --git a/cpp/include/cudf/detail/groupby/sort_helper.hpp b/cpp/include/cudf/detail/groupby/sort_helper.hpp
index 38059abe3b20..a18c9310ca9b 100644
--- a/cpp/include/cudf/detail/groupby/sort_helper.hpp
+++ b/cpp/include/cudf/detail/groupby/sort_helper.hpp
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2019-2024, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2019-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 
@@ -71,6 +71,8 @@ struct sort_groupby_helper {
    * @throw cudf::logic_error if `values.size() != keys.num_rows()`
    *
    * @param values The value column to group and sort
+   * @param stream CUDA stream used for device memory operations and kernel launches
+   * @param mr Device memory resource used to allocate the returned device memory
    * @return the sorted and grouped column
    */
   std::unique_ptr<column> sorted_values(column_view const& values,
@@ -85,6 +87,8 @@ struct sort_groupby_helper {
    * @throw cudf::logic_error if `values.size() != keys.num_rows()`
    *
    * @param values The value column to group
+   * @param stream CUDA stream used for device memory operations and kernel launches
+   * @param mr Device memory resource used to allocate the returned device memory
    * @return the grouped column
    */
   std::unique_ptr<column> grouped_values(column_view const& values,
diff --git a/cpp/include/cudf/detail/iterator.cuh b/cpp/include/cudf/detail/iterator.cuh
index efcd46a2b31c..df27ee05832f 100644
--- a/cpp/include/cudf/detail/iterator.cuh
+++ b/cpp/include/cudf/detail/iterator.cuh
@@ -93,7 +93,7 @@ struct null_replaced_value_accessor {
    * @throws cudf::logic_error if `has_nulls` is true but `col` does not have a validity mask.
    *
    * @param[in] col column device view of cudf column
-   * @param[in] null_replacement The value to return for null elements
+   * @param[in] null_val The value to return for null elements
    * @param[in] has_nulls Must be set to true if `col` has nulls.
    */
   null_replaced_value_accessor(column_device_view const& col,
diff --git a/cpp/include/cudf/detail/null_mask.cuh b/cpp/include/cudf/detail/null_mask.cuh
index a8275d351c4f..364a56463bac 100644
--- a/cpp/include/cudf/detail/null_mask.cuh
+++ b/cpp/include/cudf/detail/null_mask.cuh
@@ -349,6 +349,7 @@ size_type inplace_bitmask_binop(Binop op,
  * This function performs bitwise operations on segments of bitmasks defined by segment_offsets,
  * writing the results directly to the specified destination masks.
  *
+ * @param[in] op The binary operation to apply
  * @param[out] dest_masks Device span of pointers to destination bitmasks where results will be
  * written
  * @param[in] dest_mask_size The size of each destination mask in bitmask words
diff --git a/cpp/include/cudf/detail/rolling.hpp b/cpp/include/cudf/detail/rolling.hpp
index d201161c640d..ad6b878d260c 100644
--- a/cpp/include/cudf/detail/rolling.hpp
+++ b/cpp/include/cudf/detail/rolling.hpp
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2021-2025, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2021-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 
@@ -79,6 +79,7 @@ std::unique_ptr<column> rolling_window(column_view const& input,
  * being sorted, must be sorted consistently with the @p order and @p null_order
  * parameters.
  * @param grouping Optional preprocessed grouping information.
+ * @param direction The window direction (preceding or following)
  * @param order The sort order of the @p orderby column.
  * @param null_order The sort order of nulls in the @p orderby column.
  * @param window Descriptor specifying the window type.
diff --git a/cpp/include/cudf/detail/scatter.cuh b/cpp/include/cudf/detail/scatter.cuh
index 1f369ba3e3b8..ec7cc0d2e9e9 100644
--- a/cpp/include/cudf/detail/scatter.cuh
+++ b/cpp/include/cudf/detail/scatter.cuh
@@ -355,8 +355,6 @@ struct column_scatterer_impl<struct_view> {
  * source columns to rows in the target columns
  * @param[in] target The set of columns into which values from the source_table
  * are to be scattered
- * @param[in] check_bounds Optionally perform bounds checking on the values of
- * `scatter_map` and throw an error if any of its values are out of bounds.
  * @param[in] stream CUDA stream used for device memory operations and kernel launches.
  * @param[in] mr Device memory resource used to allocate the returned table's device memory
  *
diff --git a/cpp/include/cudf/detail/sizes_to_offsets_iterator.cuh b/cpp/include/cudf/detail/sizes_to_offsets_iterator.cuh
index 6a2f8b73168a..4ed4c3e397d6 100644
--- a/cpp/include/cudf/detail/sizes_to_offsets_iterator.cuh
+++ b/cpp/include/cudf/detail/sizes_to_offsets_iterator.cuh
@@ -245,6 +245,7 @@ static sizes_to_offsets_iterator<ScanIterator, LastType> make_sizes_to_offsets_i
  * @param end End of the input iterator
  * @param result Output iterator for scan result
  * @param initial_offset Initial offset to add to scan
+ * @param stream CUDA stream used for device memory operations and kernel launches
  * @return The last element of the scan
  */
 template <typename SizesIterator, typename OffsetsIterator>
diff --git a/cpp/include/cudf/detail/structs/utilities.hpp b/cpp/include/cudf/detail/structs/utilities.hpp
index 661e6521fe16..a8302b984d21 100644
--- a/cpp/include/cudf/detail/structs/utilities.hpp
+++ b/cpp/include/cudf/detail/structs/utilities.hpp
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2020-2025, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2020-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 #pragma once
@@ -66,7 +66,8 @@ struct temporary_nullable_data {
  *            {{"abc", "def", "ghi"}, {"uvw", "xyz"} ]
  * @endcode
  *
- * @param columns Vector of structs columns to extract from.
+ * @param struct_cols Vector of structs columns to extract from.
+ * @param stream CUDA stream used for device memory operations and kernel launches
  * @return New column with concatenated results.
  */
 std::vector<std::vector<column_view>> extract_ordered_struct_children(
diff --git a/cpp/include/cudf/detail/tdigest/tdigest.hpp b/cpp/include/cudf/detail/tdigest/tdigest.hpp
index aedee44c2d64..9e2fe5ee8a08 100644
--- a/cpp/include/cudf/detail/tdigest/tdigest.hpp
+++ b/cpp/include/cudf/detail/tdigest/tdigest.hpp
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2021-2025, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2021-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 
@@ -218,7 +218,7 @@ std::unique_ptr<scalar> reduce_tdigest(column_view const& values,
  *   double       // max
  * }
  *
- * @param values tdigests to merge.
+ * @param input tdigests to merge.
  * @param max_centroids Parameter controlling the level of compression of the tdigest. Higher
  * values result in a larger, more precise tdigest.
  * @param stream CUDA stream used for device memory operations and kernel launches.
diff --git a/cpp/include/cudf/detail/timezone.cuh b/cpp/include/cudf/detail/timezone.cuh
index f379faab4761..5605eb30734d 100644
--- a/cpp/include/cudf/detail/timezone.cuh
+++ b/cpp/include/cudf/detail/timezone.cuh
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2023, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2023-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 #pragma once
@@ -17,10 +17,7 @@ namespace cudf::detail {
 /**
  * @brief Returns the UT offset for a given date and given timezone table.
  *
- * @param transition_times Transition times; trailing `solar_cycle_entry_count` entries are used for
- * all times beyond the one covered by the TZif file
- * @param offsets Time offsets in specific intervals; trailing `solar_cycle_entry_count` entries are
- * used for all times beyond the one covered by the TZif file
+ * @param tz_table Timezone conversion table
  * @param ts ORC timestamp
  *
  * @return offset from UT, in seconds
diff --git a/cpp/include/cudf/detail/utilities/cuda.hpp b/cpp/include/cudf/detail/utilities/cuda.hpp
index d3a04cefcd86..492024f43d74 100644
--- a/cpp/include/cudf/detail/utilities/cuda.hpp
+++ b/cpp/include/cudf/detail/utilities/cuda.hpp
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2024-2025, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2024-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 
@@ -30,6 +30,7 @@ cudf::size_type num_multiprocessors();
  * @param[in] kernel The kernel for which the elements per thread needs to be assessed
  * @param[in] total_size Number of elements
  * @param[in] block_size Expected block size
+ * @param[in] max_per_thread Maximum number of elements per thread
  *
  * @return cudf::size_type Elements per thread that can be processed for given specification.
  */
diff --git a/cpp/include/cudf/detail/utilities/device_atomics.cuh b/cpp/include/cudf/detail/utilities/device_atomics.cuh
index 8b0a0d29fb83..867aa76f12ff 100644
--- a/cpp/include/cudf/detail/utilities/device_atomics.cuh
+++ b/cpp/include/cudf/detail/utilities/device_atomics.cuh
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2019-2025, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2019-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 
@@ -150,7 +150,7 @@ struct typesAtomicCASImpl {
  * int8_t, int16_t, int32_t, int64_t, float, double
  *
  * @param address The address of old value in global or shared memory
- * @param val The value to be computed
+ * @param update_value The value to be computed
  * @param op  The binary operator used for compute
  *
  * @returns The old value at `address`
diff --git a/cpp/include/cudf/detail/utilities/grid_1d.cuh b/cpp/include/cudf/detail/utilities/grid_1d.cuh
index 6e16c8c24179..63ecfa64a693 100644
--- a/cpp/include/cudf/detail/utilities/grid_1d.cuh
+++ b/cpp/include/cudf/detail/utilities/grid_1d.cuh
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2025, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2025-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 
@@ -81,10 +81,9 @@ class grid_1d {
    *
    * The returned stride is the total number of threads in the grid.
    *
-   * @param thread_id The thread index within the block
-   * @param block_id The block index within the grid
    * @param num_threads_per_block The number of threads per block
-   * @return thread_index_type The global thread index
+   * @param num_blocks_per_grid Number of blocks in the grid
+   * @return thread_index_type The grid stride
    */
   __device__ static constexpr thread_index_type grid_stride(thread_index_type num_threads_per_block,
                                                             thread_index_type num_blocks_per_grid)
diff --git a/cpp/include/cudf/detail/utilities/host_vector.hpp b/cpp/include/cudf/detail/utilities/host_vector.hpp
index 9d4a19c63cbc..cb7769cfe9ef 100644
--- a/cpp/include/cudf/detail/utilities/host_vector.hpp
+++ b/cpp/include/cudf/detail/utilities/host_vector.hpp
@@ -152,7 +152,7 @@ class rmm_host_allocator {
    *  with this \c rmm_host_allocator.
    *
    *  @param p A \c pointer to the previously allocated memory.
-   *  @note The second parameter is the number of objects previously allocated.
+   *  @param cnt Number of objects that werepreviously allocated.
    *  @note This method does not invoke \p value_type's destructor.
    *        It is the responsibility of the caller to destroy
    *        the objects stored at \p p.
diff --git a/cpp/include/cudf/detail/utilities/vector_factories.hpp b/cpp/include/cudf/detail/utilities/vector_factories.hpp
index 94ec43f447dc..ec871b3544da 100644
--- a/cpp/include/cudf/detail/utilities/vector_factories.hpp
+++ b/cpp/include/cudf/detail/utilities/vector_factories.hpp
@@ -336,7 +336,7 @@ std::vector<typename Container::value_type> make_std_vector_async(Container cons
  * @note This function does a synchronize on `stream` after the copy.
  *
  * @tparam T The type of the data to copy
- * @param source_data The device data to copy
+ * @param v The device data to copy
  * @param stream The stream on which to perform the copy
  * @return The data copied to the host
  */
@@ -410,7 +410,7 @@ host_vector<T> make_empty_host_vector(size_t capacity, rmm::cuda_stream_view str
  * using a pinned memory resource.
  *
  * @tparam T The type of the data to copy
- * @param source_data The device data to copy
+ * @param v The device data to copy
  * @param stream The stream on which to perform the copy
  * @return The data copied to the host
  */
diff --git a/cpp/include/cudf/detail/valid_if.cuh b/cpp/include/cudf/detail/valid_if.cuh
index 30a28dd2db98..d21fd9ba2f71 100644
--- a/cpp/include/cudf/detail/valid_if.cuh
+++ b/cpp/include/cudf/detail/valid_if.cuh
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2019-2025, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2019-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 
@@ -73,6 +73,7 @@ CUDF_KERNEL void valid_if_kernel(
  * @param end The end of the sequence
  * @param p The predicate
  * @param stream CUDA stream used for device memory operations and kernel launches
+ * @param mr Device memory resource used to allocate the returned device memory
  * @return A pair containing a `device_buffer` with the new bitmask and its null count
  */
 template <typename InputIterator, typename Predicate>
diff --git a/cpp/include/cudf/dictionary/detail/update_keys.hpp b/cpp/include/cudf/dictionary/detail/update_keys.hpp
index 895dc251ade2..e9dfc716b0ce 100644
--- a/cpp/include/cudf/dictionary/detail/update_keys.hpp
+++ b/cpp/include/cudf/dictionary/detail/update_keys.hpp
@@ -83,7 +83,7 @@ std::vector<std::unique_ptr<column>> match_dictionaries(
  *
  * Any null rows are left unchanged.
  *
- * @param input Vector of cudf::table_views that include dictionary columns to be matched.
+ * @param tables Vector of cudf::table_views that include dictionary columns to be matched.
  * @param stream CUDA stream used for device memory operations and kernel launches.
  * @param mr Device memory resource used to allocate the returned column's device memory.
  * @return New dictionary columns and updated cudf::table_views.
diff --git a/cpp/include/cudf/io/detail/csv.hpp b/cpp/include/cudf/io/detail/csv.hpp
index 4d2ac2565c9f..b4caca69b854 100644
--- a/cpp/include/cudf/io/detail/csv.hpp
+++ b/cpp/include/cudf/io/detail/csv.hpp
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2020-2024, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2020-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 
@@ -17,7 +17,7 @@ namespace io::detail::csv {
 /**
  * @brief Reads the entire dataset.
  *
- * @param sources Input `datasource` object to read the dataset from
+ * @param source Input `datasource` object to read the dataset from
  * @param options Settings for controlling reading behavior
  * @param stream CUDA stream used for device memory operations and kernel launches
  * @param mr Device memory resource to use for device memory allocation
diff --git a/cpp/include/cudf/io/detail/json.hpp b/cpp/include/cudf/io/detail/json.hpp
index 367aeb55be63..7d67d550cbe2 100644
--- a/cpp/include/cudf/io/detail/json.hpp
+++ b/cpp/include/cudf/io/detail/json.hpp
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2020-2024, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2020-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 
@@ -59,7 +59,7 @@ void normalize_single_quotes(datasource::owning_buffer<rmm::device_buffer>& inda
 /**
  * @brief Normalize unquoted whitespace (space and tab characters) using FST
  *
- * @param indata Input device buffer
+ * @param d_input Input device buffer
  * @param col_offsets Offsets to column contents in input buffer
  * @param col_lengths Length of contents of each row in column
  * @param stream CUDA stream used for device memory operations and kernel launches
diff --git a/cpp/include/cudf/io/text/detail/trie.hpp b/cpp/include/cudf/io/text/detail/trie.hpp
index 0ef9bb892373..cee08b53520f 100644
--- a/cpp/include/cudf/io/text/detail/trie.hpp
+++ b/cpp/include/cudf/io/text/detail/trie.hpp
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2021-2025, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2021-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 
@@ -165,7 +165,7 @@ struct trie {
   /**
    * @brief Create a trie which represents the given pattern.
    *
-   * @param pattern The patterns to store in the trie
+   * @param patterns The patterns to store in the trie
    * @param stream The stream to use for allocation and copy
    * @param mr Memory resource to use for the device memory allocation
    * @return The trie.
diff --git a/cpp/include/cudf/strings/detail/convert/fixed_point.cuh b/cpp/include/cudf/strings/detail/convert/fixed_point.cuh
index 570eb31978ad..57ad5a61fcee 100644
--- a/cpp/include/cudf/strings/detail/convert/fixed_point.cuh
+++ b/cpp/include/cudf/strings/detail/convert/fixed_point.cuh
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2021-2025, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2021-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 #pragma once
@@ -26,7 +26,8 @@ namespace detail {
  *                             unsigned type from the storage type.
  *
  * @param[in,out] iter Start of characters to parse
- * @param[in] end End of characters to parse
+ * @param[in] iter_end End of characters to parse
+ * @param[in] decimal_pt_char The character used as the decimal point
  * @return Integer component and exponent offset.
  */
 template <typename UnsignedDecimalType>
@@ -74,7 +75,7 @@ __device__ inline cuda::std::pair<UnsignedDecimalType, int32_t> parse_integer(
  *         exponent value in the decimal string does not overflow int32
  * @param[in,out] iter Start of characters to parse
  *                     (points to the character after the 'E' or 'e')
- * @param[in] end End of characters to parse
+ * @param[in] iter_end End of characters to parse
  * @return Integer value of the exponent
  */
 template <bool check_only = false>
diff --git a/cpp/include/cudf/strings/detail/copy_range.hpp b/cpp/include/cudf/strings/detail/copy_range.hpp
index 4289a8cae203..2c77008ac703 100644
--- a/cpp/include/cudf/strings/detail/copy_range.hpp
+++ b/cpp/include/cudf/strings/detail/copy_range.hpp
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2024, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2024-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 #pragma once
@@ -29,7 +29,7 @@ namespace strings::detail {
  *
  * @param source The strings column to copy from inside the `target_begin` range
  * @param target The strings column to copy from outside the range
- * @param source_end The index of the first element in the source range
+ * @param source_begin Index of the first element in the source range
  * @param source_end The index of the last element in the source range (exclusive)
  * @param target_begin The starting index of the target range (inclusive)
  * @param stream CUDA stream used for device memory operations and kernel launches.
diff --git a/cpp/include/cudf/strings/detail/scatter.cuh b/cpp/include/cudf/strings/detail/scatter.cuh
index 5dbbbd1199f8..12d8ce2088e4 100644
--- a/cpp/include/cudf/strings/detail/scatter.cuh
+++ b/cpp/include/cudf/strings/detail/scatter.cuh
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2019-2025, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2019-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 #pragma once
@@ -39,7 +39,8 @@ namespace detail {
  * @tparam SourceIterator must produce string_view objects
  * @tparam MapIterator must produce index values within the target column.
  *
- * @param source The iterator of source strings to scatter into the output column.
+ * @param begin Begin iterator of source strings to scatter into the output column.
+ * @param end End iterator of source strings to scatter into the output column.
  * @param scatter_map Iterator of indices into the output column.
  * @param target The set of columns into which values from the source column
  *        are to be scattered.
diff --git a/cpp/include/cudf/utilities/bit.hpp b/cpp/include/cudf/utilities/bit.hpp
index 545cd4c339c0..98e38362d784 100644
--- a/cpp/include/cudf/utilities/bit.hpp
+++ b/cpp/include/cudf/utilities/bit.hpp
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2019-2025, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2019-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 
@@ -182,6 +182,7 @@ __device__ inline void set_bit(bitmask_type* bitmask, size_type bit_index)
 
  * This function is thread-safe.
  *
+ * @param bitmask The bitmask to modify
  * @param bit_index  Index of the bit to clear
  */
 __device__ inline void clear_bit(bitmask_type* bitmask, size_type bit_index)
diff --git a/cpp/include/cudf_test/stream_checking_resource_adaptor.hpp b/cpp/include/cudf_test/stream_checking_resource_adaptor.hpp
index 7c5a99938056..fef6fbb64720 100644
--- a/cpp/include/cudf_test/stream_checking_resource_adaptor.hpp
+++ b/cpp/include/cudf_test/stream_checking_resource_adaptor.hpp
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2022-2025, NVIDIA CORPORATION.
+ * SPDX-FileCopyrightText: Copyright (c) 2022-2026, NVIDIA CORPORATION.
  * SPDX-License-Identifier: Apache-2.0
  */
 #pragma once
@@ -25,6 +25,8 @@ class stream_checking_resource_adaptor final : public rmm::mr::device_memory_res
    * @throws `cudf::logic_error` if `upstream == nullptr`
    *
    * @param upstream The resource used for allocating/deallocating device memory
+   * @param error_on_invalid_stream Whether to error on invalid streams
+   * @param check_default_stream Whether to check for the default stream
    */
   stream_checking_resource_adaptor(rmm::device_async_resource_ref upstream,
                                    bool error_on_invalid_stream,
diff --git a/cpp/include/cudf_test/testing_main.hpp b/cpp/include/cudf_test/testing_main.hpp
index d1994be5723b..2a140dc9f9b9 100644
--- a/cpp/include/cudf_test/testing_main.hpp
+++ b/cpp/include/cudf_test/testing_main.hpp
@@ -154,7 +154,7 @@ inline auto parse_cudf_test_opts(int argc, char** argv)
  *
  * The caller must keep the return object alive for the life of the test runs.
  *
- * @param cmd_opts Command line options returned by parse_cudf_test_opts
+ * @param config Command line options returned by parse_cudf_test_opts
  * @return Memory resource adaptor
  */
 inline auto make_memory_resource_adaptor(cudf::test::config const& config)
@@ -172,7 +172,7 @@ inline auto make_memory_resource_adaptor(cudf::test::config const& config)
  *
  * The caller must keep the return object alive for the life of the test runs.
  *
- * @param cmd_opts Command line options returned by parse_cudf_test_opts
+ * @param config Command line options returned by parse_cudf_test_opts
  * @return Memory resource adaptor
  */
 inline auto make_stream_mode_adaptor(cudf::test::config const& config)