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CVE-2026-27456

🗓️ 03 Apr 2026 21:23:00Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 72 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
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-27456
3 Apr 202621:23
attackerkb
AlpineLinux
CVE-2026-27456
3 Apr 202621:23
alpinelinux
AstraLinux
Astra Linux – Vulnerability in util-linux
24 Jun 202615:11
astralinux
CBLMariner
CVE-2026-27456 affecting package util-linux for versions less than 2.40.2-4
9 May 202603:31
cbl_mariner
Circl
CVE-2026-27456
14 Apr 202613:10
circl
CNNVD
util-linux 安全漏洞
3 Apr 202600:00
cnnvd
Cvelist
CVE-2026-27456 util-linux: TOCTOU Race Condition in util-linux mount(8) - Loop Device Setup
3 Apr 202621:23
cvelist
Debian CVE
CVE-2026-27456
3 Apr 202621:23
debiancve
Tenable Nessus
EulerOS 2.0 SP13 : util-linux (EulerOS-SA-2026-2317)
10 Jun 202600:00
nessus
Tenable Nessus
EulerOS 2.0 SP13 : util-linux (EulerOS-SA-2026-2360)
10 Jun 202600:00
nessus
Rows per page
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 vulnerability in the SUID mount binary allows replacing the source path between verification and use, leading to root access via a symlink to a privileged file.CWE-59CWE-367CWE-269
fstab entry path for loop devicepath/usr/bin/mountTOCTOU vulnerability in the SUID mount binary allows replacing the source path between verification and use, leading to root access via a symlink to a privileged file.CWE-59CWE-367CWE-269
source path used by loop devices in fstab with user,loop optionspath/etc/fstab/etc/fstab can be leveraged to trigger mounting of a privileged target via a manipulated path in a loop-device setup.CWE-59CWE-367CWE-269

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17 Jun 2026 10:27Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.14.7
EPSS0.00118
SSVC
72