GHSA-2CGV-28VR-RV6J

Vulnerability from github – Published: 2025-12-04 17:24 – Updated: 2026-02-17 22:00
VLAI?
Summary
libcrux incorrectly calculates on aarch64
Details

On platforms without the core::arch::aarch64::vxarq_u64 intrinsic, an unverified fallback in libcrux-intrinsics v0.0.3 passed incorrect arguments and produced wrong results. This corrupted SHA-3 digests and caused libcrux-ml-kem and libcrux-ml-dsa to sample incorrectly, yielding incorrect shared secrets and invalid signatures.

The issue has been fixed in v0.0.4.

Severity ?
8.8 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "libcrux-intrinsics"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.3"
            },
            {
              "fixed": "0.0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0.3"
      ]
    },
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "libcrux-ml-kem"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.3"
            },
            {
              "fixed": "0.0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0.3"
      ]
    },
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "libcrux-ml-dsa"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.3"
            },
            {
              "fixed": "0.0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0.3"
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-200",
      "CWE-327"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-12-04T17:24:23Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "On platforms without the `core::arch::aarch64::vxarq_u64` intrinsic, an unverified fallback in `libcrux-intrinsics` v0.0.3\npassed incorrect arguments and produced wrong results. This corrupted SHA-3 digests and caused `libcrux-ml-kem` and\n`libcrux-ml-dsa` to sample incorrectly, yielding incorrect shared secrets and invalid signatures.\n\nThe issue has been fixed in v0.0.4.",
  "id": "GHSA-2cgv-28vr-rv6j",
  "modified": "2026-02-17T22:00:42Z",
  "published": "2025-12-04T17:24:23Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/cryspen/libcrux/issues/1220"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cryspen/libcrux/pull/1222"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cryspen/libcrux/commit/8d10f45631afd1d93fabb2278dbb388a075b5608"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/cryspen/libcrux"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2025-0133.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "libcrux incorrectly calculates on aarch64"
}


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