# CVE-2009-0835: Security feature bypass in n/a

> Local attackers can bypass seccomp restrictions by exploiting syscall handling flaws in the Linux kernel on x86_64 systems.

- **Severity:** Low 3.6 (`AV:L/AC:L/Au:N/C:P/I:P/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 6 Mar 2009
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-x75x-89gj-wfcm

## What is CVE-2009-0835?

CVE-2009-0835 is a low-severity vulnerability in Linux kernel, published on 6 Mar 2009. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The __secure_computing function in kernel/seccomp.c in the seccomp subsystem in the Linux kernel 2.6.28.7 and earlier on the x86_64 platform, when CONFIG_SECCOMP is enabled, 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 intended access restrictions via crafted syscalls that are misinterpreted as (a) stat or (b) chmod, a related issue to CVE-2009-0342 and CVE-2009-0343.

Weakness: CWE-264

## Which versions are affected by CVE-2009-0835?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2009-0835?

Apply the vendor's patch.

## Is CVE-2009-0835 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2009-0835 exists.

Public exploit code:

- Linux Kernel 2.6.x - 'seccomp' System Call Security Bypass (exploitdb)

## Other vulnerabilities in Linux kernel

- [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2009-0835 and fix it if it is affected.

What it is: CVE-2009-0835 is a low-severity vulnerability in Linux kernel, published on 6 Mar 2009. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2009-0835 exists.

Affected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2009-0835/ (Markdown: https://insights.sbomify.com/CVE-2009-0835/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-0835
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-0835
- OSV: https://osv.dev/vulnerability/CVE-2009-0835

---
From sbomify Insights: https://insights.sbomify.com/CVE-2009-0835/
Summaries are generated and may contain mistakes; the official description above is the record.