Description
The ip6_frag_queue function in net/ipv6/reassembly.c in the Linux kernel before 2.6.36 allows remote attackers to bypass intended network restrictions via overlapping IPv6 fragments.
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 | 2.6.36-1~experimental.1 | — |
| Debian 13 | linux | 2.6.36-1~experimental.1 | — |
| Debian 12 | linux | 2.6.36-1~experimental.1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | perf +15 | 2.6.32-279.19.1.el6 | RHSA-2012:1580 |
| RHEL 5 | kernel +12 | 2.6.18-348.1.1.el5 | RHSA-2013:0168 |
Advisories 2
- RHSA-2013:0168 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2012:1580 Red Hat Security Advisory: kernel security, bug fix and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
References
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36
- SUSE-SU-2013:0856 vendor-advisory
- RHSA-2012:1580 vendor-advisory
- [oss-security] 20121109 Re: CVE request --- acceptation of overlapping ipv6 fragments mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=874835
- https://github.com/torvalds/linux/commit/70789d7052239992824628db8133de08dc78e593
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=70789d7052239992824628db8133de08dc78e593
- https://media.blackhat.com/bh-eu-12/Atlasis/bh-eu-12-Atlasis-Attacking_IPv6-WP.pdf
- USN-1661-1 vendor-advisory
- USN-1660-1 vendor-advisory