Description
The ip_frag_reasm function in net/ipv4/ip_fragment.c in the Linux kernel 2.6.32-rc8, and 2.6.29 and later versions before 2.6.32, calls IP_INC_STATS_BH with an incorrect argument, which allows remote attackers to cause a denial of service (NULL pointer dereference and hang) via long IP packets, possibly related to the ip_defrag function.
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 6.0 | linux-2.6 | 2.6.30-8squeeze1 | DTSA-204-1 |
Advisories 1
- DTSA-204-1 linux-2.6 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://twitter.com/spendergrsec/statuses/6339560349
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=bbf31bf18d34caa87dd01f08bf713635593697f2
- SUSE-SA:2010:001 vendor-advisory
- MDVSA-2009:329 vendor-advisory
- USN-869-1 vendor-advisory
- FEDORA-2009-12786 vendor-advisory
- http://wiki.rpath.com/Advisories:rPSA-2009-0161
- 20091216 rPSA-2009-0161-1 hwdata kernel mailing-list
- http://www.theregister.co.uk/2009/12/11/linux_kernel_bugs_patched/
- 37624 third-party-advisory
- FEDORA-2009-12825 vendor-advisory
- 60788 vdb-entry
- https://bugzilla.redhat.com/show_bug.cgi?id=544144
- 38017 third-party-advisory
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.32