FKIE_CVE-2026-53615

Vulnerability from fkie_nvd - Published: 2026-10-14 16:17 - Updated: 2026-10-15 16:18
Severity
8.0 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
Summary
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.
References
security-advisories@github.comhttps://github.com/util-linux/util-linux/commit/05c2dbadf34cc74192287f377904afaaf4061623
security-advisories@github.comhttps://github.com/util-linux/util-linux/commit/a2d858176b609ab5b8535021a3af9cd302d23d31
security-advisories@github.comhttps://github.com/util-linux/util-linux/commit/e9d544d013267ea86b70ee8ff78abd280e6641af
security-advisories@github.comhttps://github.com/util-linux/util-linux/releases/tag/v2.41.4
security-advisories@github.comhttps://github.com/util-linux/util-linux/security/advisories/GHSA-h4rw-gv36-wmp5
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "util-linux",
          "vendor": "util-linux",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.41.4"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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",
  "lastModified": "2026-10-15T16:18:13.260",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 8.0,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 5.5,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-53615",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-10-14T16:11:25.315520Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-10-14T16:17:46.070",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/util-linux/util-linux/commit/05c2dbadf34cc74192287f377904afaaf4061623"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/util-linux/util-linux/commit/a2d858176b609ab5b8535021a3af9cd302d23d31"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/util-linux/util-linux/commit/e9d544d013267ea86b70ee8ff78abd280e6641af"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/util-linux/util-linux/releases/tag/v2.41.4"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/util-linux/util-linux/security/advisories/GHSA-h4rw-gv36-wmp5"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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