Description
kernel/signal.c in the Linux kernel before 2.6.39 allows local users to spoof the uid and pid of a signal sender via a sigqueueinfo system call.
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 6.0 | linux-2.6 | 2.6.32-34squeeze1 | DSA-2240-1 |
| Debian 5.0 | linux-2.6 | 2.6.26-26lenny3 | DSA-2264-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | perf +14 | 2.6.32-131.12.1.el6 | RHSA-2011:1189 |
| RHEL 5 | kernel +11 | 2.6.18-238.19.1.el5 | RHSA-2011:0927 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6.0 EUS | perf +14 | 2.6.32-71.31.1.el6 | RHSA-2011:0883 |
Advisories 5
- RHSA-2011:1189 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2240-1 linux-2.6 - several issues Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-2264-1 linux-2.6 - several issues Debian Security (DSA / DLA) · Mar 9, 2026
- RHSA-2011:0927 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jan 14, 2026
- RHSA-2011:0883 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Nov 22, 2025
References
- [oss-security] 20110323 Re: Linux kernel signal spoofing vulnerability (CVE request) mailing-list
- RHSA-2011:0927 vendor-advisory
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
- https://github.com/torvalds/linux/commit/da48524eb20662618854bb3df2db01fc65f3070c
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=da48524eb20662618854bb3df2db01fc65f3070c
- https://bugzilla.redhat.com/show_bug.cgi?id=690028