{
  "affected": [
    {
      "database_specific": {
        "categories": [],
        "cvss": "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",
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [
            "x86_64"
          ],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "libcrux-ml-dsa",
        "purl": "pkg:cargo/libcrux-ml-dsa"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.0.9"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "The AVX2 implementation of ML-DSA verification incorrectly implemented\nthe `use_hint` function, mishandling an edge case that should lead to\nsignature rejection.\n\n## Impact\nAn attacker could make the ML-DSA verifier accept a crafted invalid\nsignature under a maliciously generated verification key, if the AVX2\nimplementation is used.\n\n## Mitigation\nFrom version `0.0.9` the edge case is handled correctly and invalid\nsignatures are rejected.",
  "id": "RUSTSEC-2026-0125",
  "modified": "2026-05-13T10:05:44Z",
  "published": "2026-05-05T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/libcrux-ml-dsa"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0125.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cryspen/libcrux/pull/1398"
    },
    {
      "type": "WEB",
      "url": "https://github.com/C2SP/wycheproof/pull/234"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tink-crypto/tink-go/pull/48"
    }
  ],
  "related": [],
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Signature Verification on AVX2 Platforms Mishandles Edge Case"
}