{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.24.4"
              },
              {
                "fixed": "2.28.7"
              },
              {
                "introduced": "2.29.0"
              },
              {
                "fixed": "2.29.4"
              },
              {
                "introduced": "2.30.0"
              },
              {
                "fixed": "2.30.5"
              },
              {
                "introduced": "2.31.0"
              },
              {
                "fixed": "2.31.5"
              },
              {
                "introduced": "2.32.0"
              },
              {
                "fixed": "2.32.8"
              },
              {
                "introduced": "2.33.0"
              },
              {
                "fixed": "2.33.6"
              },
              {
                "introduced": "2.34.0"
              },
              {
                "fixed": "2.34.7"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "cb0439f0c2d28f971369365d0937dbfaa76b0cce"
            },
            {
              "fixed": "af8365d4b4bb75bfffbb8b5484ea4865e6dcb92b"
            },
            {
              "introduced": "0cd1fce3c3fde7dade50b23a19d9cdea0e6e2137"
            },
            {
              "fixed": "620b5e764649d78581d0653646af4999a79380ab"
            },
            {
              "introduced": "812e0693022c77a3ce77b1342be1d0aef850f2d8"
            },
            {
              "fixed": "3a1c0b40158384a8ad4e1229c67336ed96cec721"
            },
            {
              "introduced": "ec6ba866d1a75f04a43d3ac4061a3b0277be842b"
            },
            {
              "fixed": "cc38c0c5ca55d533c5fb3e944305ca9926d32181"
            },
            {
              "introduced": "d069633b3df1db53b9724a5bb332f910d71c5daf"
            },
            {
              "fixed": "ad2aac683cda793a3b860eabd9c0ad528097ae65"
            },
            {
              "introduced": "231d5b41ed1b4b65f4cb875994691a4e40b150d9"
            },
            {
              "fixed": "66e78e0aaaf8b82c4e7c6cd69129b659422711c8"
            },
            {
              "introduced": "8e6cda649a12964370addcdf68907b66661c3265"
            },
            {
              "fixed": "2c6d06e9387cf58167cb5a7ab91cee7333d8d17c"
            }
          ],
          "repo": "https://github.com/nixos/nix",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-vh5x-56v6-4368"
  ],
  "database_specific": {
    "cna_assigner": "mitre",
    "cwe_ids": [
      "CWE-674"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44028.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "2.93.0"
          },
          {
            "fixed": "2.93.4"
          },
          {
            "introduced": "2.94.0"
          },
          {
            "fixed": "2.94.2"
          },
          {
            "introduced": "2.95.0"
          },
          {
            "fixed": "2.95.2"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "An issue was discovered in Nix before 2.34.7 and Lix before 2.95.2. Unbounded recursion in the NAR (Nix Archive) parser could lead to a stack-to-heap overflow when the parser is run on a coroutine stack. The stack is allocated without a guard page, which means that a stack overflow could overwrite memory on the heap and could allow arbitrary code execution as the Nix daemon (run as root in multi-user installations) if ASLR hardening is bypassed. This can be exploited by all users able to connect to the daemon (e.g., in Nix, this is configurable via the allowed-users setting, defaulting to all users). The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 for Nix (introduced in 2.24.4); and 2.95.2, 2.94.2, and 2.93.4 for Lix (introduced in 2.93.0).",
  "id": "CVE-2026-44028",
  "modified": "2026-07-08T05:39:10.018674803Z",
  "published": "2026-05-05T00:30:16.205Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2026/05/04/32"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2026/05/04/33"
    },
    {
      "type": "ADVISORY",
      "url": "https://discourse.nixos.org/t/security-advisory-local-privilege-escalation-in-lix-and-nix/77407"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44028.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/NixOS/nix/security/advisories/GHSA-vh5x-56v6-4368"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44028"
    },
    {
      "type": "ARTICLE",
      "url": "https://lix.systems/blog/2026-05-05-lix-unsigned-integer-overflow/"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}