Description
The llc_ui_getname function in net/llc/af_llc.c in the Linux kernel before 3.6 has an incorrect return value in certain circumstances, which allows local users to obtain sensitive information from kernel stack memory via a crafted application that leverages an uninitialized pointer argument.
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 | 3.2.30-1 | — |
| Debian 13 | linux | 3.2.30-1 | — |
| Debian 12 | linux | 3.2.30-1 | — |
| 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 | 2.6.18-348.4.1.el5 | RHSA-2013:0747 |
Advisories 3
- RHSA-2013:1645 Red Hat Security Advisory: Red Hat Enterprise Linux 6 kernel update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2668-1 linux-2.6 - several Debian Security (DSA / DLA) · Mar 9, 2026
- RHSA-2013:0747 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Nov 22, 2025
References
- https://github.com/torvalds/linux/commit/3592aaeb80290bda0f2cf0b5456c97bfc638b192
- USN-1805-1 vendor-advisory
- [oss-security] 20130305 CVE Requests (maybe): Linux kernel: various info leaks, some NULL ptr derefs mailing-list
- USN-1808-1 vendor-advisory
- RHSA-2013:1645 vendor-advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=3592aaeb80290bda0f2cf0b5456c97bfc638b192
- https://www.kernel.org/pub/linux/kernel/v3.x/patch-3.6.bz2