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

CVE-2026-6330

ML-KEM ARM64 NEON ciphertext comparison only compares half of the input PUBLISHED

Description (CNA)

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 party could fail to detect a manipulated ciphertext and proceed without the standard's required implicit rejection.

Affected (CNA)

Vendor / product	Versions
wolfSSL / wolfSSL	affected 5.7.4 through 5.9.1

CWE

CWE-327

References

https://github.com/wolfSSL/wolfssl/pull/10192
https://www.wolfssl.com/docs/security-vulnerabilities/

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.