CVE-2009-0834

What it is

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.

At a glance

Exploitability

Can be exploited locally on the machine without logging in. Limited direct impact.

Exploit odds

0.4% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2009-03-06 11:30 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:05 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.4% in the next 30 days (EPSS).
• Severity: 3.6 LOW (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2009-03-06 11:30 UTC

Last modified

2026-06-16 23:05 UTC

Exploit probability

0.4% · EPSS, next 30 days

Record status

Modified

Affected

• Linux Kernel ≤ 2.6.28.7
• Debian Linux 4.0
• Debian Linux 5.0
• Canonical Ubuntu Linux 7.10
• Canonical Ubuntu Linux 8.04
• Canonical Ubuntu Linux 8.10
• Redhat Enterprise Linux Desktop 4.0
• Redhat Enterprise Linux Desktop 5.0

Attack profile CVSS 2.0 · 3.6

Attack vector

Local

Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2009-0834.md and follow it. Check whether this project is affected by CVE-2009-0834. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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