diff --git a/Cargo.lock b/Cargo.lock
index bb211e9cc1dd61..0c90a7197d9017 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2012,9 +2012,9 @@ dependencies = [
 
 [[package]]
 name = "cpufeatures"
-version = "0.2.17"
+version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "59ed5838eebb26a2bb2e58f6d5b5316989ae9d08bab10e0e6d103e656d1b0280"
+checksum = "3e4c1eaa2012c47becbbad2ab175484c2a84d1185b566fb2cc5b8707343dfe58"
 dependencies = [
  "libc",
 ]
diff --git a/programs/sbf/Cargo.lock b/programs/sbf/Cargo.lock
index c08b474bd58879..e9affb391cb48e 100644
--- a/programs/sbf/Cargo.lock
+++ b/programs/sbf/Cargo.lock
@@ -1322,9 +1322,9 @@ dependencies = [
 
 [[package]]
 name = "cpufeatures"
-version = "0.2.17"
+version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "59ed5838eebb26a2bb2e58f6d5b5316989ae9d08bab10e0e6d103e656d1b0280"
+checksum = "3e4c1eaa2012c47becbbad2ab175484c2a84d1185b566fb2cc5b8707343dfe58"
 dependencies = [
  "libc",
 ]
@@ -1431,9 +1431,9 @@ dependencies = [
 
 [[package]]
 name = "curve25519-dalek"
-version = "4.2.0"
+version = "4.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "373b7c5dbd637569a2cca66e8d66b8c446a1e7bf064ea321d265d7b3dfe7c97e"
+checksum = "97fb8b7c4503de7d6ae7b42ab72a5a59857b4c937ec27a3d4539dba95b5ab2be"
 dependencies = [
  "cfg-if 1.0.0",
  "cpufeatures",
@@ -1947,9 +1947,9 @@ checksum = "835a3dc7d1ec9e75e2b5fb4ba75396837112d2060b03f7d43bc1897c7f7211da"
 
 [[package]]
 name = "fiat-crypto"
-version = "0.3.0"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "64cd1e32ddd350061ae6edb1b082d7c54915b5c672c389143b9a63403a109f24"
+checksum = "28dea519a9695b9977216879a3ebfddf92f1c08c05d984f8996aecd6ecdc811d"
 
 [[package]]
 name = "filetime"
@@ -6242,7 +6242,7 @@ checksum = "def3cfe5279edb64fc39111cff6dcf77b01fbfba2c02c13ced41e6a48baf4cbe"
 dependencies = [
  "bytemuck",
  "bytemuck_derive",
- "curve25519-dalek 4.2.0",
+ "curve25519-dalek 4.1.3",
  "solana-define-syscall",
  "subtle",
  "thiserror 2.0.12",
@@ -6254,7 +6254,7 @@ version = "3.0.0"
 dependencies = [
  "bytemuck",
  "bytemuck_derive",
- "curve25519-dalek 4.2.0",
+ "curve25519-dalek 4.1.3",
  "solana-define-syscall",
  "subtle",
  "thiserror 2.0.12",
@@ -7127,7 +7127,7 @@ dependencies = [
  "bv",
  "bytes",
  "caps",
- "curve25519-dalek 4.2.0",
+ "curve25519-dalek 4.1.3",
  "dlopen2",
  "fnv",
  "libc",
@@ -7456,7 +7456,7 @@ dependencies = [
  "borsh 1.5.7",
  "bytemuck",
  "bytemuck_derive",
- "curve25519-dalek 4.2.0",
+ "curve25519-dalek 4.1.3",
  "five8",
  "five8_const",
  "getrandom 0.2.10",
@@ -9850,7 +9850,7 @@ dependencies = [
  "bincode",
  "bytemuck",
  "bytemuck_derive",
- "curve25519-dalek 4.2.0",
+ "curve25519-dalek 4.1.3",
  "itertools 0.12.1",
  "js-sys",
  "lazy_static",
@@ -9885,7 +9885,7 @@ dependencies = [
  "bincode",
  "bytemuck",
  "bytemuck_derive",
- "curve25519-dalek 4.2.0",
+ "curve25519-dalek 4.1.3",
  "itertools 0.12.1",
  "js-sys",
  "merlin",
@@ -9934,7 +9934,7 @@ dependencies = [
  "bincode",
  "bytemuck",
  "bytemuck_derive",
- "curve25519-dalek 4.2.0",
+ "curve25519-dalek 4.1.3",
  "itertools 0.12.1",
  "merlin",
  "num-derive",
@@ -10261,7 +10261,7 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ae5b124840d4aed474cef101d946a798b806b46a509ee4df91021e1ab1cef3ef"
 dependencies = [
- "curve25519-dalek 4.2.0",
+ "curve25519-dalek 4.1.3",
  "solana-zk-sdk 2.2.15",
  "thiserror 2.0.12",
 ]
diff --git a/svm/examples/Cargo.lock b/svm/examples/Cargo.lock
index a5bfdb088bdcd2..9a7ef415bcb436 100644
--- a/svm/examples/Cargo.lock
+++ b/svm/examples/Cargo.lock
@@ -1322,9 +1322,9 @@ dependencies = [
 
 [[package]]
 name = "curve25519-dalek"
-version = "4.2.0"
+version = "4.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "373b7c5dbd637569a2cca66e8d66b8c446a1e7bf064ea321d265d7b3dfe7c97e"
+checksum = "97fb8b7c4503de7d6ae7b42ab72a5a59857b4c937ec27a3d4539dba95b5ab2be"
 dependencies = [
  "cfg-if 1.0.0",
  "cpufeatures",
@@ -1818,9 +1818,9 @@ checksum = "835a3dc7d1ec9e75e2b5fb4ba75396837112d2060b03f7d43bc1897c7f7211da"
 
 [[package]]
 name = "fiat-crypto"
-version = "0.3.0"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "64cd1e32ddd350061ae6edb1b082d7c54915b5c672c389143b9a63403a109f24"
+checksum = "28dea519a9695b9977216879a3ebfddf92f1c08c05d984f8996aecd6ecdc811d"
 
 [[package]]
 name = "filetime"
@@ -6075,7 +6075,7 @@ checksum = "def3cfe5279edb64fc39111cff6dcf77b01fbfba2c02c13ced41e6a48baf4cbe"
 dependencies = [
  "bytemuck",
  "bytemuck_derive",
- "curve25519-dalek 4.2.0",
+ "curve25519-dalek 4.1.3",
  "solana-define-syscall",
  "subtle",
  "thiserror 2.0.12",
@@ -6087,7 +6087,7 @@ version = "3.0.0"
 dependencies = [
  "bytemuck",
  "bytemuck_derive",
- "curve25519-dalek 4.2.0",
+ "curve25519-dalek 4.1.3",
  "solana-define-syscall",
  "subtle",
  "thiserror 2.0.12",
@@ -6925,7 +6925,7 @@ dependencies = [
  "bv",
  "bytes",
  "caps",
- "curve25519-dalek 4.2.0",
+ "curve25519-dalek 4.1.3",
  "dlopen2",
  "fnv",
  "libc",
@@ -7254,7 +7254,7 @@ dependencies = [
  "borsh 1.5.7",
  "bytemuck",
  "bytemuck_derive",
- "curve25519-dalek 4.2.0",
+ "curve25519-dalek 4.1.3",
  "five8",
  "five8_const",
  "getrandom 0.2.15",
@@ -8933,7 +8933,7 @@ dependencies = [
  "bincode",
  "bytemuck",
  "bytemuck_derive",
- "curve25519-dalek 4.2.0",
+ "curve25519-dalek 4.1.3",
  "itertools 0.12.1",
  "js-sys",
  "lazy_static",
@@ -8968,7 +8968,7 @@ dependencies = [
  "bincode",
  "bytemuck",
  "bytemuck_derive",
- "curve25519-dalek 4.2.0",
+ "curve25519-dalek 4.1.3",
  "itertools 0.12.1",
  "js-sys",
  "merlin",
@@ -9017,7 +9017,7 @@ dependencies = [
  "bincode",
  "bytemuck",
  "bytemuck_derive",
- "curve25519-dalek 4.2.0",
+ "curve25519-dalek 4.1.3",
  "itertools 0.12.1",
  "merlin",
  "num-derive",
@@ -9344,7 +9344,7 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ae5b124840d4aed474cef101d946a798b806b46a509ee4df91021e1ab1cef3ef"
 dependencies = [
- "curve25519-dalek 4.2.0",
+ "curve25519-dalek 4.1.3",
  "solana-zk-sdk 2.2.15",
  "thiserror 2.0.12",
 ]