Description
The ipv6_hop_jumbo function in net/ipv6/exthdrs.c in the Linux kernel before 2.6.22 does not properly validate the hop-by-hop IPv6 extended header, which allows remote attackers to cause a denial of service (NULL pointer dereference and kernel panic) via a crafted IPv6 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.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | kernel +11 | 2.6.18-164.10.1.el5 | RHSA-2010:0019 |
| RHEL 5 | rhev-hypervisor +1 | 5.4-2.1.8.el5_4rhev2_1 | RHSA-2010:0095 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5.3 EUS | kernel +11 | 2.6.18-128.12.1.el5 | RHSA-2010:0053 |
| RHEL 5.2 EUS | kernel +11 | 2.6.18-92.1.35.el5 | RHSA-2010:0079 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Exploit-DB 1
- Linux Kernel 2.6.22 - IPv6 Hop-By-Hop Header Remote Denial of Service EDB-30902 · dos · Dec 19, 2007 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 4
- RHSA-2010:0095 Red Hat Security Advisory: rhev-hypervisor security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2010:0079 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2010:0053 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2010:0019 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
References
- linux-kernel-ipv6-dos(39171) vdb-entry
- oval:org.mitre.oval:def:7474 vdb-entry signature
- http://bugzilla.kernel.org/show_bug.cgi?id=8450
- 28706 third-party-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=548641
- RHSA-2010:0053 vendor-advisory
- RHSA-2010:0019 vendor-advisory
- 26943 vdb-entry
- USN-558-1 vendor-advisory
- 25505 third-party-advisory
- USN-574-1 vendor-advisory
- RHSA-2010:0095 vendor-advisory
- oval:org.mitre.oval:def:11083 vdb-entry signature
- 28170 third-party-advisory
- 38015 third-party-advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=e76b2b2567b83448c2ee85a896433b96150c92e6