VULNERABILITY INTELLIGENCE

CVE-2026-6330

CVSS score6.5 MEDIUM
EPSS probability0.17%
CISA KEVNot currently listed
Published2026-06-25
Last modified2026-06-27
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Description

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.

Weakness classification

  • facts@wolfssl.com: CWE-327

Primary references