rustsec-2026-0073
Vulnerability from osv_rustsec
Published
2026-03-04 12:00
Modified
2026-03-27 05:55
Summary
Panic in Standalone MAC Operations
Details

An incorrect constant for the key length in libcrux-poly1305 caused the standalone MAC function libcrux_poly1305::mac to always panic with an out-of-bounds memory access.

Impact

Applications wishing to use libcrux-poly1305 as a standalone MAC would experience panics. The use of libcrux-poly1305 in libcrux-chacha20poly1305 is unaffected.

Mitigation

Starting from version 0.0.5, the correct value is used for the key length constant.

Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "categories": [],
        "cvss": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [
            "libcrux_poly1305::mac"
          ],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "libcrux-poly1305",
        "purl": "pkg:cargo/libcrux-poly1305"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.0.5"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "GHSA-pv9v-5j35-xwcr"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "An incorrect constant for the key length in libcrux-poly1305 caused\nthe standalone MAC function `libcrux_poly1305::mac` to always panic\nwith an out-of-bounds memory access.\n\n## Impact\nApplications wishing to use libcrux-poly1305 as a standalone MAC would\nexperience panics. The use of libcrux-poly1305 in\nlibcrux-chacha20poly1305 is unaffected.\n\n## Mitigation\nStarting from version `0.0.5`, the correct value is used for the key\nlength constant.",
  "id": "RUSTSEC-2026-0073",
  "modified": "2026-03-27T05:55:06Z",
  "published": "2026-03-04T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/libcrux-poly1305"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0073.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cryspen/libcrux/pull/1351"
    }
  ],
  "related": [],
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Panic in Standalone MAC Operations"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.