Description
The caif_seqpkt_recvmsg function in net/caif/caif_socket.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 |
Advisories 1
- DSA-2669-1 linux - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- openSUSE-SU-2013:1187 vendor-advisory
- MDVSA-2013:176 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
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2d6fbfe733f35c6b355c216644e08e149c61b271
- SUSE-SU-2013:1182 vendor-advisory
- https://github.com/torvalds/linux/commit/2d6fbfe733f35c6b355c216644e08e149c61b271