Description
The handle_stop_signal function in signal.c in Linux kernel 2.6.11 up to other versions before 2.6.13 and 2.6.12.6 allows local users to cause a denial of service (deadlock) by sending a SIGKILL to a real-time threaded process while it is performing a core dump.
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 3.1 | kernel-source-2.6.8 | 2.6.8-16sarge2 | DSA-1017-1 |
Advisories 1
- DSA-1017-1 kernel-source-2.6.8 - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- 19038 third-party-advisory
- http://www.kernel.org/git/?p=linux/kernel/git/chrisw/stable-queue.git%3Ba=blob%3Bh=f6cc7e101c49f356e4c4df5cca1ff352a0f01dd5%3Bhb=9c5fcb99af7c157be45e9d53aeb857ded5211fcd%3Bf=2.6.12.6/nptl-signal-delivery-deadlock-fix.patch
- [linux-kernel] 20050826 [PATCH 2/7] [PATCH] NPTL signal delivery deadlock fix mailing-list
- http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=dd12f48d4e8774415b528d3991ae47c28f26e1ac%3Bhp=ade6648b3b11a5d81f6f28135193ab6d85d621db
- 16856 vdb-entry
- SUSE-SA:2006:012 vendor-advisory
- DSA-1017 vendor-advisory
- 19374 third-party-advisory
- [linux-kernel] 20050817 [PATCH 2.6.12.5] NPTL signal delivery deadlock fix mailing-list