{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.41.4"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "05c2dbadf34cc74192287f377904afaaf4061623"
            },
            {
              "fixed": "a2d858176b609ab5b8535021a3af9cd302d23d31"
            },
            {
              "fixed": "e9d544d013267ea86b70ee8ff78abd280e6641af"
            },
            {
              "fixed": "e147e16fa9a9d3b3ad5968bf42280966ac3a8529"
            }
          ],
          "repo": "https://github.com/util-linux/util-linux",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-h4rw-gv36-wmp5"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-190"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53615.json"
  },
  "details": "util-linux is a random collection of Linux utilities. Before util-linux 2.41.4, `parse_dos_extended()` in `libblkid/src/partitions/dos.c` computes an extended-partition start sector with 32-bit addition and does not apply the extended-area bounds checks to the first two EBR entries. A local attacker who causes a crafted DOS extended-partition disk image or removable medium to be probed can wrap `cur_start + start` to sector zero and cause libblkid to report a false partition overlapping the MBR. This directly compromises the integrity of the reported partition metadata; disk modification or availability loss requires a separate downstream consumer to act on that metadata. This issue is fixed in 2.41.4.",
  "id": "CVE-2026-53615",
  "modified": "2026-10-17T02:30:29.326918449Z",
  "published": "2026-10-14T15:56:45.310Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/util-linux/util-linux/releases/tag/v2.41.4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53615.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/util-linux/util-linux/security/advisories/GHSA-h4rw-gv36-wmp5"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53615"
    },
    {
      "type": "FIX",
      "url": "https://github.com/util-linux/util-linux/commit/05c2dbadf34cc74192287f377904afaaf4061623"
    },
    {
      "type": "FIX",
      "url": "https://github.com/util-linux/util-linux/commit/a2d858176b609ab5b8535021a3af9cd302d23d31"
    },
    {
      "type": "FIX",
      "url": "https://github.com/util-linux/util-linux/commit/e9d544d013267ea86b70ee8ff78abd280e6641af"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "util-linux libblkid DOS extended-partition overflow produces invalid partition metadata"
}