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Medium severity6.5OSV Advisory· Published Jun 25, 2026· Updated Jun 27, 2026

CVE-2026-6330

CVE-2026-6330

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.

Affected products

3
  • WolfSSL/WolfsslOSV3 versions
    v5.9.1-stable, v5.9.0-stable, v5.8.4-stable, …+ 2 more
    • (no CPE)range: v5.9.1-stable, v5.9.0-stable, v5.8.4-stable, …
    • cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*range: >=5.7.4,<5.9.2
    • (no CPE)

Patches

Vulnerability mechanics

References

2

News mentions

0

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