EUVD-2026-39570

The ML-KEM ARM64 NEON ciphertext comparison only compares half of the input, breaking the Fujisaki-Okamoto transform's implicit rejection and weakening IND-CCA2 security on that code path. The constant-time comparison effectively ignored part of the re-encrypted ciphertext, so a decapsulating par...

CVE-2026-6330 ML-KEM ARM64 NEON ciphertext comparison only compares half of the input

The ML-KEM ARM64 NEON ciphertext comparison only compares half of the input, breaking the Fujisaki-Okamoto transform's implicit rejection and weakening IND-CCA2 security on that code path. The constant-time comparison effectively ignored part of the re-encrypted ciphertext, so a decapsulating par...

PT-2026-52603

Name of the Vulnerable Software and Affected Versions ML-KEM affected versions not specified Description An issue exists in the ARM64 NEON ciphertext comparison where only half of the input is compared. This failure breaks the implicit rejection of the Fujisaki-Okamoto transform—a method used to...

PT-2026-52560

Name of the Vulnerable Software and Affected Versions wolfSSL affected versions not specified Description The AVX2-optimized ML-KEM implementation contains a logic error in the mlkem cmp avx2 function during the Fujisaki-Okamoto transform. In ML-KEM-1024 decapsulation, the constant-time ciphertex...