Description
net/ipv6/ip6_output.c in the Linux kernel through 3.11.4 does not properly determine the need for UDP Fragmentation Offload (UFO) processing of small packets after the UFO queueing of a large packet, which allows remote attackers to cause a denial of service (memory corruption and system crash) or possibly have unspecified other impact via network traffic that triggers a large response packet.
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 | — |
| Debian 6.0 | linux-2.6 | 2.6.32-48squeeze8 | DLA-0015-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | perf +16 | 2.6.32-431.el6 | RHSA-2013:1645 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6.4 EUS | perf +14 | 2.6.32-358.37.1.el6 | RHSA-2014:0284 |
| Red Hat MRG 2 | kernel-rt +11 | 3.8.13-rt14.25.el6rt | RHSA-2013:1490 |
Advisories 4
- RHSA-2014:0284 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2013:1645 Red Hat Security Advisory: Red Hat Enterprise Linux 6 kernel update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2013:1490 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DLA-0015-1 linux-2.6 - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- USN-2024-1 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1011927
- https://github.com/torvalds/linux/commit/2811ebac2521ceac84f2bdae402455baa6a7fb47
- RHSA-2013:1490 vendor-advisory
- USN-2039-1 vendor-advisory
- USN-2022-1 vendor-advisory
- RHSA-2013:1645 vendor-advisory
- USN-2038-1 vendor-advisory
- USN-2021-1 vendor-advisory
- USN-2019-1 vendor-advisory
- USN-2049-1 vendor-advisory
- RHSA-2014:0284 vendor-advisory
- USN-2045-1 vendor-advisory
- USN-2050-1 vendor-advisory
- USN-2041-1 vendor-advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2811ebac2521ceac84f2bdae402455baa6a7fb47
- [oss-security] 20130928 Re: linux kernel memory corruption with ipv6 udp offloading mailing-list