CVE-2026-53613High· 7.0▾ MidnightPoC availableutil-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 `/et…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 38.5 · likelihood 0 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
1 GitHub repo (last check)
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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