diff --git a/Cargo.lock b/Cargo.lock
index d082a00f393..ac7fb185538 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -6627,7 +6627,7 @@ dependencies = [
  "solana-instruction",
  "solana-keccak-hasher",
  "solana-last-restart-slot",
- "solana-loader-v3-interface 4.0.1",
+ "solana-loader-v3-interface 5.0.0",
  "solana-loader-v4-interface",
  "solana-log-collector",
  "solana-measure",
@@ -6662,7 +6662,7 @@ dependencies = [
  "assert_matches",
  "bincode",
  "solana-bpf-loader-program",
- "solana-loader-v3-interface 4.0.1",
+ "solana-loader-v3-interface 5.0.0",
  "solana-program-test",
  "solana-sdk",
 ]
@@ -7799,7 +7799,7 @@ dependencies = [
  "solana-cli-config",
  "solana-entry",
  "solana-ledger",
- "solana-loader-v3-interface 4.0.1",
+ "solana-loader-v3-interface 5.0.0",
  "solana-logger",
  "solana-rpc-client",
  "solana-rpc-client-api",
@@ -8241,6 +8241,21 @@ dependencies = [
  "solana-system-interface",
 ]
 
+[[package]]
+name = "solana-loader-v3-interface"
+version = "5.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f7162a05b8b0773156b443bccd674ea78bb9aa406325b467ea78c06c99a63a2"
+dependencies = [
+ "serde",
+ "serde_bytes",
+ "serde_derive",
+ "solana-instruction",
+ "solana-pubkey",
+ "solana-sdk-ids",
+ "solana-system-interface",
+]
+
 [[package]]
 name = "solana-loader-v4-interface"
 version = "2.2.1"
@@ -8269,7 +8284,7 @@ dependencies = [
  "solana-clock",
  "solana-compute-budget",
  "solana-instruction",
- "solana-loader-v3-interface 4.0.1",
+ "solana-loader-v3-interface 5.0.0",
  "solana-loader-v4-interface",
  "solana-log-collector",
  "solana-measure",
@@ -9399,7 +9414,7 @@ dependencies = [
  "solana-frozen-abi-macro",
  "solana-inline-spl",
  "solana-lattice-hash",
- "solana-loader-v3-interface 4.0.1",
+ "solana-loader-v3-interface 5.0.0",
  "solana-loader-v4-interface",
  "solana-logger",
  "solana-measure",
@@ -10046,7 +10061,7 @@ dependencies = [
  "solana-instruction",
  "solana-instructions-sysvar",
  "solana-keypair",
- "solana-loader-v3-interface 4.0.1",
+ "solana-loader-v3-interface 5.0.0",
  "solana-loader-v4-interface",
  "solana-loader-v4-program",
  "solana-log-collector",
@@ -10591,7 +10606,7 @@ dependencies = [
  "solana-hash",
  "solana-instruction",
  "solana-loader-v2-interface",
- "solana-loader-v3-interface 4.0.1",
+ "solana-loader-v3-interface 5.0.0",
  "solana-message",
  "solana-program",
  "solana-pubkey",
diff --git a/Cargo.toml b/Cargo.toml
index 38f7c76e391..ea6ff1508e4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -446,7 +446,7 @@ solana-last-restart-slot = "2.2.1"
 solana-lattice-hash = { path = "lattice-hash", version = "=2.2.16" }
 solana-ledger = { path = "ledger", version = "=2.2.16" }
 solana-loader-v2-interface = "2.2.1"
-solana-loader-v3-interface = "4.0.1"
+solana-loader-v3-interface = "5.0.0"
 solana-loader-v4-interface = "2.2.1"
 solana-loader-v4-program = { path = "programs/loader-v4", version = "=2.2.16" }
 solana-local-cluster = { path = "local-cluster", version = "=2.2.16" }
diff --git a/feature-set/src/lib.rs b/feature-set/src/lib.rs
index 2415ea20ac6..f8085fd3d7c 100644
--- a/feature-set/src/lib.rs
+++ b/feature-set/src/lib.rs
@@ -1018,7 +1018,7 @@ pub mod mask_out_rent_epoch_in_vm_serialization {
 }
 
 pub mod enable_extend_program_checked {
-    solana_pubkey::declare_id!("97QCmR4QtfeQsAti9srfHFk5uMRFP95CvXG8EGr615HM");
+    solana_pubkey::declare_id!("2oMRZEDWT2tqtYMofhmmfQ8SsjqUFzT6sYXppQDavxwz");
 }
 
 pub static FEATURE_NAMES: LazyLock<AHashMap<Pubkey, &'static str>> = LazyLock::new(|| {
diff --git a/genesis/Cargo.toml b/genesis/Cargo.toml
index 82eedd77dd7..42a5866e2a5 100644
--- a/genesis/Cargo.toml
+++ b/genesis/Cargo.toml
@@ -23,7 +23,7 @@ solana-clap-utils = { workspace = true }
 solana-cli-config = { workspace = true }
 solana-entry = { workspace = true }
 solana-ledger = { workspace = true }
-solana-loader-v3-interface = "=4.0.1"
+solana-loader-v3-interface = "5.0.0"
 solana-logger = "=2.3.1"
 solana-rpc-client = { workspace = true }
 solana-rpc-client-api = { workspace = true }
diff --git a/programs/bpf_loader/src/syscalls/cpi.rs b/programs/bpf_loader/src/syscalls/cpi.rs
index 1041952308f..e0bfde29440 100644
--- a/programs/bpf_loader/src/syscalls/cpi.rs
+++ b/programs/bpf_loader/src/syscalls/cpi.rs
@@ -1,7 +1,9 @@
 use {
     super::*,
     crate::serialization::account_data_region_memory_state,
-    agave_feature_set::enable_bpf_loader_set_authority_checked_ix,
+    agave_feature_set::{
+        enable_bpf_loader_set_authority_checked_ix, enable_extend_program_checked,
+    },
     scopeguard::defer,
     solana_loader_v3_interface::instruction as bpf_loader_upgradeable,
     solana_measure::measure::Measure,
@@ -1067,6 +1069,12 @@ fn check_authorized_program(
                     && bpf_loader_upgradeable::is_set_authority_checked_instruction(
                         instruction_data,
                     ))
+                || (invoke_context
+                    .get_feature_set()
+                    .is_active(&enable_extend_program_checked::id())
+                    && bpf_loader_upgradeable::is_extend_program_checked_instruction(
+                        instruction_data,
+                    ))
                 || bpf_loader_upgradeable::is_close_instruction(instruction_data)))
         || is_precompile(program_id, |feature_id: &Pubkey| {
             invoke_context.get_feature_set().is_active(feature_id)
diff --git a/programs/sbf/Cargo.lock b/programs/sbf/Cargo.lock
index 3a6463253d5..fa881656884 100644
--- a/programs/sbf/Cargo.lock
+++ b/programs/sbf/Cargo.lock
@@ -5364,7 +5364,7 @@ dependencies = [
  "solana-hash",
  "solana-instruction",
  "solana-keccak-hasher",
- "solana-loader-v3-interface 4.0.1",
+ "solana-loader-v3-interface 5.0.0",
  "solana-loader-v4-interface",
  "solana-log-collector",
  "solana-measure",
@@ -6482,9 +6482,9 @@ dependencies = [
 
 [[package]]
 name = "solana-loader-v3-interface"
-version = "4.0.1"
+version = "5.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5539bcadd5c3b306045563e9d102bbaa42b3643f335ae02bc9b5260a70ad9742"
+checksum = "6f7162a05b8b0773156b443bccd674ea78bb9aa406325b467ea78c06c99a63a2"
 dependencies = [
  "serde",
  "serde_bytes",
@@ -6521,7 +6521,7 @@ dependencies = [
  "solana-bpf-loader-program",
  "solana-compute-budget",
  "solana-instruction",
- "solana-loader-v3-interface 4.0.1",
+ "solana-loader-v3-interface 5.0.0",
  "solana-loader-v4-interface",
  "solana-log-collector",
  "solana-measure",
@@ -7398,7 +7398,7 @@ dependencies = [
  "solana-fee",
  "solana-inline-spl",
  "solana-lattice-hash",
- "solana-loader-v3-interface 4.0.1",
+ "solana-loader-v3-interface 5.0.0",
  "solana-loader-v4-interface",
  "solana-measure",
  "solana-metrics",
@@ -7481,7 +7481,7 @@ dependencies = [
  "solana-compute-budget-instruction",
  "solana-fee",
  "solana-ledger",
- "solana-loader-v3-interface 4.0.1",
+ "solana-loader-v3-interface 5.0.0",
  "solana-loader-v4-interface",
  "solana-log-collector",
  "solana-logger",
@@ -8457,7 +8457,7 @@ dependencies = [
  "solana-hash",
  "solana-instruction",
  "solana-instructions-sysvar",
- "solana-loader-v3-interface 4.0.1",
+ "solana-loader-v3-interface 5.0.0",
  "solana-loader-v4-interface",
  "solana-loader-v4-program",
  "solana-log-collector",
@@ -8824,7 +8824,7 @@ dependencies = [
  "solana-hash",
  "solana-instruction",
  "solana-loader-v2-interface",
- "solana-loader-v3-interface 4.0.1",
+ "solana-loader-v3-interface 5.0.0",
  "solana-message",
  "solana-program",
  "solana-pubkey",
diff --git a/programs/sbf/Cargo.toml b/programs/sbf/Cargo.toml
index bbbd3e5af84..1cee94389de 100644
--- a/programs/sbf/Cargo.toml
+++ b/programs/sbf/Cargo.toml
@@ -124,7 +124,7 @@ solana-compute-budget-instruction = { workspace = true, features = [
 ] }
 solana-fee = { workspace = true }
 solana-ledger = { workspace = true }
-solana-loader-v3-interface = "4.0.1"
+solana-loader-v3-interface = "5.0.0"
 solana-loader-v4-interface = "2.2.1"
 solana-log-collector = { workspace = true }
 solana-logger = { workspace = true }
diff --git a/svm/examples/Cargo.lock b/svm/examples/Cargo.lock
index 4da0eac4b91..e206a1c7aa3 100644
--- a/svm/examples/Cargo.lock
+++ b/svm/examples/Cargo.lock
@@ -5231,7 +5231,7 @@ dependencies = [
  "solana-hash",
  "solana-instruction",
  "solana-keccak-hasher",
- "solana-loader-v3-interface 4.0.1",
+ "solana-loader-v3-interface 5.0.0",
  "solana-loader-v4-interface",
  "solana-log-collector",
  "solana-measure",
@@ -6315,9 +6315,9 @@ dependencies = [
 
 [[package]]
 name = "solana-loader-v3-interface"
-version = "4.0.1"
+version = "5.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5539bcadd5c3b306045563e9d102bbaa42b3643f335ae02bc9b5260a70ad9742"
+checksum = "6f7162a05b8b0773156b443bccd674ea78bb9aa406325b467ea78c06c99a63a2"
 dependencies = [
  "serde",
  "serde_bytes",
@@ -6354,7 +6354,7 @@ dependencies = [
  "solana-bpf-loader-program",
  "solana-compute-budget",
  "solana-instruction",
- "solana-loader-v3-interface 4.0.1",
+ "solana-loader-v3-interface 5.0.0",
  "solana-loader-v4-interface",
  "solana-log-collector",
  "solana-measure",
@@ -7231,7 +7231,7 @@ dependencies = [
  "solana-fee",
  "solana-inline-spl",
  "solana-lattice-hash",
- "solana-loader-v3-interface 4.0.1",
+ "solana-loader-v3-interface 5.0.0",
  "solana-loader-v4-interface",
  "solana-measure",
  "solana-metrics",
@@ -7785,7 +7785,7 @@ dependencies = [
  "solana-hash",
  "solana-instruction",
  "solana-instructions-sysvar",
- "solana-loader-v3-interface 4.0.1",
+ "solana-loader-v3-interface 5.0.0",
  "solana-loader-v4-interface",
  "solana-loader-v4-program",
  "solana-log-collector",
@@ -8171,7 +8171,7 @@ dependencies = [
  "solana-hash",
  "solana-instruction",
  "solana-loader-v2-interface",
- "solana-loader-v3-interface 4.0.1",
+ "solana-loader-v3-interface 5.0.0",
  "solana-message",
  "solana-program",
  "solana-pubkey",