Description
Race condition in the do_setlk function in fs/nfs/file.c in the Linux kernel before 2.6.26 allows local users to cause a denial of service (crash) via vectors resulting in an interrupted RPC call that leads to a stray FL_POSIX lock, related to improper handling of a race between fcntl and close in the EINTR case.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 4.0 | fai-kernels | 1.17+etch.24etch2 | DSA-1794-1 |
| Debian 4.0 | linux-2.6 | 2.6.18.dfsg.1-24etch2 | DSA-1794-1 |
| Debian 4.0 | linux-2.6.24 | 2.6.24-6~etchnhalf.8etch1 | DSA-1787-1 |
| Debian 4.0 | user-mode-linux | 2.6.18-1um-2etch.24etch2 | DSA-1794-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | kernel +12 | 2.6.18-128.1.10.el5 | RHSA-2009:0473 |
| RHEL 4 | kernel +10 | 2.6.9-78.0.22.EL | RHSA-2009:0459 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 1 | kernel-rt +9 | 2.6.24.7-111.el5rt | RHSA-2009:0451 |
Advisories 5
- RHSA-2009:0473 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2009:0459 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1787-1 linux-2.6.24 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1794-1 linux-2.6 - multiple vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- RHSA-2009:0451 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Nov 22, 2025
References
- 34962 third-party-advisory
- [oss-security] 20090113 CVE-2008-4307 kernel: local denial of service in locks_remove_flock mailing-list
- 37471 third-party-advisory
- RHSA-2009:0459 vendor-advisory
- oval:org.mitre.oval:def:7728 vdb-entry signature
- http://www.vmware.com/security/advisories/VMSA-2009-0016.html
- DSA-1794 vendor-advisory
- http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.27.y.git%3Ba=commit%3Bh=c4d7c402b788b73dc24f1e54a57f89d3dc5eb7bc
- USN-751-1 vendor-advisory
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.26
- 35015 third-party-advisory
- 35011 third-party-advisory
- 20091120 VMSA-2009-0016 VMware vCenter and ESX update release and vMA patch release address multiple security issue in third party components mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=456282
- oval:org.mitre.oval:def:9233 vdb-entry signature
- 34981 third-party-advisory
- 34917 third-party-advisory
- DSA-1787 vendor-advisory
- RHSA-2009:0473 vendor-advisory
- RHSA-2009:0451 vendor-advisory
- ADV-2009-3316 vdb-entry