CVE-2014-5207

medium

Published 2014-08-18 · Modified 2026-05-06

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

7.2

Description

fs/namespace.c in the Linux kernel through 3.16.1 does not properly restrict clearing MNT_NODEV, MNT_NOSUID, and MNT_NOEXEC and changing MNT_ATIME_MASK during a remount of a bind mount, which allows local users to gain privileges, interfere with backups and auditing on systems that had atime enabled, or cause a denial of service (excessive filesystem updating) on systems that had atime disabled via a "mount -o remount" command within a user namespace.

Predictions

Exploit likelihood

55%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-34923 local linux

Andy Lutomirski · 2014-10-09

Linux Kernel < 3.16.1 - 'Remount FUSE' Local Privilege Escalation

Source code queued for fetch — refresh in a moment.

OS impact

Linux kernel Affected 1 release

Version	Status	Fixed in
—	Affected	—

Ubuntu Affected 2 releases

Version	Status	Fixed in
14.04	Affected	—
12.04	Affected	—

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`3.16.2-1`
sid	Fixed	`3.16.2-1`
forky	Fixed	`3.16.2-1`
bullseye	Fixed	`3.16.2-1`
bookworm	Fixed	`3.16.2-1`

References

CWEs

CWE-269

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.