CVE-2026-53613

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Source
https://cve.org/CVERecord?id=CVE-2026-53613
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53613.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-53613
Aliases
  • GHSA-8gj5-72r3-428g
Downstream
ALPINE (1)
BELL (1)
DEBIAN (1)
ECHO (1)
OESA (5)
openSUSE (2)
SUSE (10)
UBUNTU (1)
Related
openSUSE (2)
SUSE (10)
Published
2026-10-14T14:52:56Z
Modified
2026-10-15T02:47:39Z
Severity
  • 7.0 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
util-linux mount target TOCTOU allows local privilege escalation
Details

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 mount(2) path is used without /proc, restricted non-root mount requests validate an /etc/fstab target before the mount operation re-resolves that pathname. A local low-privileged user authorized by an fstab user or users entry whose target has an attacker-writable ancestor can use renameat2(RENAME_EXCHANGE) to swap a path component and redirect an authorized mount to a root-owned location, such as mounting attacker-controlled content over /etc/sudoers.d, 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 /proc/self/fd; the documented legacy fallback without /proc remains affected.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-367"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53613.json"
}
References

Affected packages

Git / github.com/util-linux/util-linux

Affected ranges

Type
GIT
Repo
https://github.com/util-linux/util-linux
Events
Introduced
36b00d61a79198997acc711345a291cc3a333af3
Last Affected
02822c9374fc72d38baf8a1f859eb0813970bf3f
Introduced
0a7dfc376192e8fb1e7bdb2d0c90d8b9b173a42b
Last Affected
d76cbf8f13e65ff657344f7f6a90042cf755ba59
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "2.17"
        },
        {
            "last_affected":  "2.41.6"
        },
        {
            "introduced":  "2.42"
        },
        {
            "last_affected":  "2.42.4"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

v2.*
v2.41
v2.41-rc1
v2.41-rc2
v2.41.1
v2.41.2
v2.41.2-rc1
v2.41.3
v2.41.4
v2.41.5
v2.41.6
v2.42
v2.42-rc1
v2.42-rc2
v2.42-start
v2.42.1
v2.42.2
v2.42.3
v2.42.4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53613.json"