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CVE-2026-27456

🗓️ 03 Apr 2026 21:23:00Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 136 Views🌐 WEB

TOCTOU race in util-linux mount loop setup lets local users mount root-owned files via a symlink.

Related
Detection
Affected
Refs
Paths
NVD
Vulners
Node
kernelutil-linuxRange<2.41.4
[
  {
    "vendor": "util-linux",
    "product": "util-linux",
    "versions": [
      {
        "version": "< 2.41.4",
        "status": "affected"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
source_pathpath/usr/bin/mountTOCTOU in setuid util-linux mount when processing the source path for loop devices; an attacker can replace the source with a symlink to a root-owned file during the race window.CWE-269, CWE-367, CWE-59
source_pathpath/etc/fstabAttack via /etc/fstab entry with user,loop options where the source path points to a directory writable by the attacker, enabling mounting of a root-owned file under root privileges.CWE-269, CWE-367, CWE-59

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24 Jul 2026 22:10Current
5.3Medium risk
Vulners AI Score5.3
CVSS 3.14.7
EPSS0.00118
SSVC
136