hsec-2025-0003

{
  "affected": [
    {
      "database_specific": {
        "human_link": "https://github.com/haskell/security-advisories/tree/main/advisories/published/2025/HSEC-2025-0003.md",
        "osv": "https://raw.githubusercontent.com/haskell/security-advisories/refs/heads/generated/osv-export/2025/HSEC-2025-0003.json",
        "source": "https://github.com/haskell/security-advisories/blob/generated/osv-export/2025/HSEC-2025-0003.json"
      },
      "package": {
        "ecosystem": "Hackage",
        "name": "xz-clib",
        "purl": "pkg:hackage/xz-clib"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.6.3"
            },
            {
              "fixed": "5.8.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
          "type": "CVSS_V3"
        }
      ],
      "versions": [
        "5.6.3",
        "5.6.4",
        "5.8.0",
        "5.8.0.1"
      ]
    }
  ],
  "aliases": [
    "CVE-2025-31115",
    "GHSA-6cc8-p5mm-29w2"
  ],
  "database_specific": {
    "home": "https://github.com/haskell/security-advisories",
    "osvs": "https://raw.githubusercontent.com/haskell/security-advisories/refs/heads/generated/osv-export",
    "repository": "https://github.com/haskell/security-advisories"
  },
  "details": "# Use after free in multithreaded lzma (.xz) decoder\n\nIn XZ Utils 5.3.3alpha to 5.8.0, the multithreaded .xz decoder in\nliblzma has a bug where invalid input can at least result in a crash\n(CVE-2025-31115). The effects include heap use after free and\nwriting to an address based on the null pointer plus an offset.\nApplications and libraries that use the `lzma_stream_decoder_mt`\nfunction are affected.\n\nThe Haskell *xz-clib* library vendors and builds the C\nimplementation.  The *xz* package does not use the multithreaded\ndecoder and is therefore unaffected.\n",
  "id": "HSEC-2025-0003",
  "modified": "2025-11-14T18:15:45.530030Z",
  "published": "2025-11-14T14:45:34Z",
  "references": [
    {
      "type": "ARTICLE",
      "url": "https://tukaani.org/xz/threaded-decoder-early-free.html"
    },
    {
      "type": "FIX",
      "url": "https://github.com/tukaani-project/xz/commit/d5a2ffe41bb77b918a8c96084885d4dbe4bf6480"
    },
    {
      "type": "FIX",
      "url": "https://github.com/hasufell/lzma-static/commit/e95fe96530568addfc83b771900025053e2c6951"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "Use after free in multithreaded lzma (.xz) decoder"
}