{
  "cveId": "CVE-2026-53613",
  "url": "https://patchblox.com/security/cve/CVE-2026-53613",
  "summary": "CVE-2026-53613 is fixed in 34 products on 1 platform, first by DEBIAN-CVE-2026-53613, released June 27, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "util-linux mount target TOCTOU allows local privilege escalation",
  "description": "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 \u0060mount(2)\u0060 path is used without \u0060/proc\u0060, restricted non-root \u0060mount\u0060 requests validate an \u0060/etc/fstab\u0060 target before the mount operation re-resolves that pathname. A local low-privileged user authorized by an fstab \u0060user\u0060 or \u0060users\u0060 entry whose target has an attacker-writable ancestor can use \u0060renameat2(RENAME_EXCHANGE)\u0060 to swap a path component and redirect an authorized mount to a root-owned location, such as mounting attacker-controlled content over \u0060/etc/sudoers.d\u0060, 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 \u0060/proc/self/fd\u0060; the documented legacy fallback without \u0060/proc\u0060 remains affected.",
  "published": "2026-06-16T00:00:00Z",
  "severity": "Important",
  "cvss": 8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H",
  "cwe": "Time-of-check Time-of-use (TOCTOU) Race Condition",
  "epss": 0.00163,
  "epssPercentile": 0.05542,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53613",
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