CVE-2014-5207

Severity: medium (CVSS 6.2 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2014-08-18 · updated 2026-06-17
Weakness: CWE-269

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.

Affected products

Canonical Ubuntu Linux: 12.04, 14.04
Linux kernel: through 3.16.1

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=9566d6742852c527bf5af38af5cbb878dad75705
http://osvdb.org/show/osvdb/110055
http://packetstormsecurity.com/files/128595/Linux-Kernel-3.16.1-FUSE-Privilege-Escalation.html
http://seclists.org/oss-sec/2014/q3/352
http://www.exploit-db.com/exploits/34923
http://www.openwall.com/lists/oss-security/2014/08/13/4
http://www.securityfocus.com/bid/69216
http://www.ubuntu.com/usn/USN-2317-1
http://www.ubuntu.com/usn/USN-2318-1
https://bugzilla.redhat.com/show_bug.cgi?id=1129662
https://exchange.xforce.ibmcloud.com/vulnerabilities/95266
https://github.com/torvalds/linux/commit/9566d6742852c527bf5af38af5cbb878dad75705

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