CVE-2010-4210

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2010-11-22 · updated 2026-06-16
Weakness: CWE-667

Description

The pfs_getextattr function in FreeBSD 7.x before 7.3-RELEASE and 8.x before 8.0-RC1 unlocks a mutex that was not previously locked, which allows local users to cause a denial of service (kernel panic), overwrite arbitrary memory locations, and possibly execute arbitrary code via vectors related to opening a file on a file system that uses pseudofs.

Affected products

FreeBSD: from 7.0 before 7.3; 8.0-p1, 8.0-p2, 8.0-p3, 8.0-p4, 8.0-p5, 8.0-p6 — fixed in 7.3

How to fix

Upgrade to a fixed version: FreeBSD 7.3. Check the vendor advisory for mitigations.

References

http://secunia.com/advisories/42200
http://security.FreeBSD.org/advisories/FreeBSD-SA-10:09.pseudofs.asc
http://www.securitytracker.com/id?1024724
http://www.vupen.com/english/advisories/2010/2956
https://exchange.xforce.ibmcloud.com/vulnerabilities/63218
https://www.exploit-db.com/exploits/15206/
http://secunia.com/advisories/42200
http://security.FreeBSD.org/advisories/FreeBSD-SA-10:09.pseudofs.asc
http://www.securitytracker.com/id?1024724
http://www.vupen.com/english/advisories/2010/2956
https://exchange.xforce.ibmcloud.com/vulnerabilities/63218
https://www.exploit-db.com/exploits/15206/

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