PT-2026-52603 · Wolfssl · Wolfssl

Nicholas Carlini · Published 2026-06-25 · Updated 2026-06-25 · CVE-2026-6330

Mitre

CVSS v4.0

6.3

Medium

Base vector

AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

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.

Fix

Use of a Broken Cryptographic Algorithm

Weakness Enumeration

CWE-327

Related Identifiers

CVE-2026-6330

Affected Products

Wolfssl

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-6330 · Security Note
• https://github.com/wolfSSL/wolfssl/pull/10192 · Patch
• https://wolfssl.com/docs/security-vulnerabilities · Note