Description
The fib6_add function in net/ipv6/ip6_fib.c in the Linux kernel before 3.11.5 does not properly implement error-code encoding, which allows local users to cause a denial of service (NULL pointer dereference and system crash) by leveraging the CAP_NET_ADMIN capability for an IPv6 SIOCADDRT ioctl 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 | 3.11.5-1 | — |
| Debian 13 | linux | 3.11.5-1 | — |
| Debian 12 | linux | 3.11.5-1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 2 | kernel-rt +10 | 3.8.13-rt27.33.el6rt | RHSA-2014:0100 |
Advisories 1
- RHSA-2014:0100 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jan 14, 2026
References
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.11.5
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ae7b4e1f213aa659aedf9c6ecad0bf5f0476e1e2
- https://bugzilla.redhat.com/show_bug.cgi?id=1039054
- [oss-security] 20131206 Re: CVE request: Linux kernel: net: fib: fib6_add: potential NULL pointer dereference mailing-list
- openSUSE-SU-2014:0204 vendor-advisory
- https://github.com/torvalds/linux/commit/ae7b4e1f213aa659aedf9c6ecad0bf5f0476e1e2
- RHSA-2014:0100 vendor-advisory