Description
The llc_ui_recvmsg function in net/llc/af_llc.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom 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 | 3.8.11-1 | — |
| Debian 13 | linux | 3.8.11-1 | — |
| Debian 12 | linux | 3.8.11-1 | — |
| Debian 7 | linux | 3.2.41-2+deb7u2 | DSA-2669-1 |
| 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 +16 | 2.6.32-431.el6 | RHSA-2013:1645 |
| RHEL 5 | kernel +12 | 2.6.18-348.12.1.el5 | RHSA-2013:1034 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 2 | kernel-rt +11 | 3.6.11.2-rt33.39.el6rt | RHSA-2013:0829 |
Advisories 5
- RHSA-2013:1645 Red Hat Security Advisory: Red Hat Enterprise Linux 6 kernel update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2013:0829 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2669-1 linux - several Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-2668-1 linux-2.6 - several Debian Security (DSA / DLA) · Mar 9, 2026
- RHSA-2013:1034 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Nov 22, 2025
References
- openSUSE-SU-2013:1187 vendor-advisory
- FEDORA-2013-6537 vendor-advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=c77a4b9cffb6215a15196ec499490d116dfad181
- MDVSA-2013:176 vendor-advisory
- RHSA-2013:1645 vendor-advisory
- FEDORA-2013-6999 vendor-advisory
- USN-1837-1 vendor-advisory
- [linux-kernel] 20130414 Linux 3.9-rc7 mailing-list
- [oss-security] 20130414 Linux kernel: more net info leak fixes for v3.9 mailing-list
- openSUSE-SU-2013:1971 vendor-advisory
- https://github.com/torvalds/linux/commit/c77a4b9cffb6215a15196ec499490d116dfad181
- SUSE-SU-2013:1182 vendor-advisory