Description
The kernel in Red Hat Enterprise Linux 3, when running on SMP systems, allows local users to cause a denial of service (deadlock) by running the shmat function on an shm at the same time that shmctl is removing that shm (IPC_RMID), which prevents a spinlock from being unlocked.
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.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 3 | kernel +8 | 2.4.21-47.0.1.EL | RHSA-2006:0710 |
Advisories 1
- RHSA-2006:0710 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
References
- VU#245984 third-party-advisory
- oval:org.mitre.oval:def:9649 vdb-entry signature
- https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=205618
- 23064 third-party-advisory
- http://support.avaya.com/elmodocs2/security/ASA-2006-254.htm
- 22497 third-party-advisory
- RHSA-2006:0710 vendor-advisory