Description
The flush_signal_handlers function in kernel/signal.c in the Linux kernel before 3.8.4 preserves the value of the sa_restorer field across an exec operation, which makes it easier for local users to bypass the ASLR protection mechanism via a crafted application containing a sigaction 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 14 | linux | 3.2.41-1 | — |
| Debian 13 | linux | 3.2.41-1 | — |
| Debian 12 | linux | 3.2.41-1 | — |
| Debian 6.0 | linux-2.6 | 2.6.32-48squeeze3 | DSA-2668-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | perf +15 | 2.6.32-358.14.1.el6 | RHSA-2013:1051 |
| RHEL 5 | kernel +12 | 2.6.18-348.12.1.el5 | RHSA-2013:1034 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 3 | perf +9 | 2.6.32-358.114.1.openstack.el6 | RHSA-2013:1080 |
| Red Hat MRG 2 | kernel-rt +11 | 3.6.11.2-rt33.39.el6rt | RHSA-2013:0829 |
Advisories 5
- RHSA-2013:0829 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2013:1051 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-2668-1 linux-2.6 - several Debian Security (DSA / DLA) · Mar 9, 2026
- RHSA-2013:1080 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2013:1034 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Nov 22, 2025
References
- USN-1796-1 vendor-advisory
- openSUSE-SU-2013:1187 vendor-advisory
- https://github.com/torvalds/linux/commit/2ca39528c01a933f6689cd6505ce65bd6d68a530
- MDVSA-2013:176 vendor-advisory
- USN-1797-1 vendor-advisory
- USN-1788-1 vendor-advisory
- RHSA-2013:1051 vendor-advisory
- USN-1793-1 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=920499
- USN-1792-1 vendor-advisory
- openSUSE-SU-2013:1971 vendor-advisory
- USN-1794-1 vendor-advisory
- USN-1795-1 vendor-advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2ca39528c01a933f6689cd6505ce65bd6d68a530
- [oss-security] 20130311 CVE-2013-0914 Linux kernel sa_restorer information leak mailing-list
- USN-1787-1 vendor-advisory
- USN-1798-1 vendor-advisory
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.4