Description
The l2tp_ip_recvmsg function in net/l2tp/l2tp_ip.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel stack memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg 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 | 3.12.6-1 | — |
| Debian 13 | linux | 3.12.6-1 | — |
| Debian 12 | linux | 3.12.6-1 | — |
| Debian 6.0 | linux-2.6 | 2.6.32-48squeeze5 | DSA-2906-1 |
Advisories 1
- DSA-2906-1 linux-2.6 - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- USN-2135-1 vendor-advisory
- USN-2138-1 vendor-advisory
- USN-2108-1 vendor-advisory
- USN-2113-1 vendor-advisory
- USN-2141-1 vendor-advisory
- USN-2110-1 vendor-advisory
- [oss-security] 20140107 oss-sec: CVE split and a missed file mailing-list
- USN-2136-1 vendor-advisory
- USN-2139-1 vendor-advisory
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4
- https://github.com/torvalds/linux/commit/bceaa90240b6019ed73b49965eac7d167610be69
- USN-2117-1 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1035875
- 56036 third-party-advisory
- USN-2109-1 vendor-advisory
- SUSE-SU-2014:0459 vendor-advisory
- USN-2107-1 vendor-advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=bceaa90240b6019ed73b49965eac7d167610be69
- [oss-security] 20131128 Re: CVE Request: Linux kernel: net: uninitialised memory leakage mailing-list
- 55882 third-party-advisory