CVE-2026-53613: util-linux mount target TOCTOU allows local privilege escalation
Affected: util-linux · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 5% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- util-linux · util-linux>= 2.17, <= 2.41.6; >= 2.42, <= 2.42.4
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- util-linux
- Published
- October 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-53613 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.
References
- NVD entrynvd.nist.gov
- CVE recordcve.org
- Weakness CWE-367cwe.mitre.org
- github.com/util-linux/util-linux/security/advisories/GHSA-8gj5-7github.com
- github.com/util-linux/util-linux/commit/0b010025a0e429bc80355c94github.com
- github.com/util-linux/util-linux/commit/0d3d55975aa3492c62fd345egithub.com
- github.com/util-linux/util-linux/commit/2c773f336134acf016e639abgithub.com
- github.com/util-linux/util-linux/commit/39fef62bf3226abb6bb018fagithub.com
- github.com/util-linux/util-linux/commit/472cc3fb2d4d47cca7aab2e0github.com
- github.com/util-linux/util-linux/commit/646fb66603d10a7ac337e14fgithub.com
- github.com/util-linux/util-linux/commit/708d1b3c51932dc5ba8082c7github.com
- github.com/util-linux/util-linux/commit/78a860982e036f38fe9c0b33github.com
- github.com/util-linux/util-linux/commit/85d16b341f7232c9dbb4884bgithub.com
- github.com/util-linux/util-linux/commit/a9508d216eb8977979102782github.com
- github.com/util-linux/util-linux/releases/tag/v2.41.5github.com
2 more references are in the CVE record.