GHSA-fhvh-vw7h-9xf3

Suggest an improvement
Source
https://github.com/advisories/GHSA-fhvh-vw7h-9xf3
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-fhvh-vw7h-9xf3/GHSA-fhvh-vw7h-9xf3.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-fhvh-vw7h-9xf3
Aliases
Published
2026-05-19T16:18:53Z
Modified
2026-05-20T07:26:23Z
Severity
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
libcrux-ml-dsa: Signature Verification on AVX2 Platforms Mishandles Edge Case
Details

The AVX2 implementation of ML-DSA verification incorrectly implemented the use_hint function, mishandling an edge case that should lead to signature rejection.

Impact

An attacker could make the ML-DSA verifier accept a crafted invalid signature under a maliciously generated verification key, if the AVX2 implementation is used.

Mitigation

From version 0.0.9 the edge case is handled correctly and invalid signatures are rejected.

Database specific 
{
    "cwe_ids":  [
        "CWE-347"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-05-19T16:18:53Z",
    "nvd_published_at":  null,
    "severity":  "HIGH"
}
References

Affected packages

crates.io / libcrux-ml-dsa

Package

Name
libcrux-ml-dsa
View open source insights on deps.dev
Purl
pkg:cargo/libcrux-ml-dsa

Affected ranges

Type
SEMVER
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.0.9

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-fhvh-vw7h-9xf3/GHSA-fhvh-vw7h-9xf3.json"