{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.17"
              },
              {
                "last_affected": "2.41.6"
              },
              {
                "introduced": "2.42"
              },
              {
                "last_affected": "2.42.4"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "36b00d61a79198997acc711345a291cc3a333af3"
            },
            {
              "last_affected": "02822c9374fc72d38baf8a1f859eb0813970bf3f"
            },
            {
              "introduced": "0a7dfc376192e8fb1e7bdb2d0c90d8b9b173a42b"
            },
            {
              "last_affected": "d76cbf8f13e65ff657344f7f6a90042cf755ba59"
            }
          ],
          "repo": "https://github.com/util-linux/util-linux",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-8gj5-72r3-428g"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-367"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53613.json"
  },
  "details": "util-linux is a random collection of Linux utilities. In util-linux 2.17 through 2.41.6 and 2.42 through 2.42.3, and in 2.42.4 when the legacy `mount(2)` path is used without `/proc`, restricted non-root `mount` requests validate an `/etc/fstab` target before the mount operation re-resolves that pathname. A local low-privileged user authorized by an fstab `user` or `users` entry whose target has an attacker-writable ancestor can use `renameat2(RENAME_EXCHANGE)` to swap a path component and redirect an authorized mount to a root-owned location, such as mounting attacker-controlled content over `/etc/sudoers.d`, and thereby gain root privileges. Versions 2.41.5 and 2.42.2 pin targets for the new mount API, and 2.42.4 pins legacy targets through `/proc/self/fd`; the documented legacy fallback without `/proc` remains affected.",
  "id": "CVE-2026-53613",
  "modified": "2026-10-15T02:30:41.066848375Z",
  "published": "2026-10-14T14:52:56.063Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53613.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/util-linux/util-linux/commit/0b010025a0e429bc80355c94db86a843395d49e2"
    },
    {
      "type": "FIX",
      "url": "https://github.com/util-linux/util-linux/commit/0d3d55975aa3492c62fd345eac38f41cd166c0b0"
    },
    {
      "type": "FIX",
      "url": "https://github.com/util-linux/util-linux/commit/2c773f336134acf016e639abb6f12ba7341fe4b8"
    },
    {
      "type": "FIX",
      "url": "https://github.com/util-linux/util-linux/commit/39fef62bf3226abb6bb018fa8750afa0327e84b4"
    },
    {
      "type": "FIX",
      "url": "https://github.com/util-linux/util-linux/commit/472cc3fb2d4d47cca7aab2e0b59eb3fb8a9359ec"
    },
    {
      "type": "FIX",
      "url": "https://github.com/util-linux/util-linux/commit/646fb66603d10a7ac337e14f566f1af48e3107c9"
    },
    {
      "type": "FIX",
      "url": "https://github.com/util-linux/util-linux/commit/708d1b3c51932dc5ba8082c7368187715e6a8d78"
    },
    {
      "type": "FIX",
      "url": "https://github.com/util-linux/util-linux/commit/78a860982e036f38fe9c0b3344998df5ac2c2ff5"
    },
    {
      "type": "FIX",
      "url": "https://github.com/util-linux/util-linux/commit/85d16b341f7232c9dbb4884b632e1e956584bee9"
    },
    {
      "type": "FIX",
      "url": "https://github.com/util-linux/util-linux/commit/a9508d216eb8977979102782672e0470cc9bf2a2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/util-linux/util-linux/releases/tag/v2.41.5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/util-linux/util-linux/releases/tag/v2.42.2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/util-linux/util-linux/releases/tag/v2.42.4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/util-linux/util-linux/security/advisories/GHSA-8gj5-72r3-428g"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53613"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "util-linux mount target TOCTOU allows local privilege escalation"
}