Description
Integer overflow in the get_fdb_entries function in net/bridge/br_ioctl.c in the Linux kernel before 2.6.18.4 allows local users to execute arbitrary code via a large maxnum value in an ioctl request.
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 3.1 | kernel-source-2.6.8 | 2.6.8-16sarge6 | DSA-1233-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 4 | kernel +8 | 2.6.9-42.0.8.EL | RHSA-2007:0014 |
Advisories 2
- RHSA-2007:0014 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-1233-1 kernel-source-2.6.8 - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ba8379b220509e9448c00a77cf6c15ac2a559cc7
- SUSE-SA:2006:079 vendor-advisory
- http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.18.4
- https://issues.rpath.com/browse/RPL-803
- 23073 third-party-advisory
- oval:org.mitre.oval:def:10151 vdb-entry signature
- ADV-2006-4781 vdb-entry
- RHSA-2007:0014 vendor-advisory
- MDKSA-2007:012 vendor-advisory
- 23593 third-party-advisory
- SUSE-SA:2007:021 vendor-advisory
- https://issues.rpath.com/browse/RPL-837
- http://support.avaya.com/elmodocs2/security/ASA-2007-063.htm
- 23384 third-party-advisory
- 23752 third-party-advisory
- 24206 third-party-advisory
- http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=blobdiff%3Bh=4c61a7e0a86e1ae9e16867f9f8e4b0412b8edbaf%3Bhp=4e4119a1213925568b8a1acdef9bf52b98b19da3%3Bhb=ba8379b220509e9448c00a77cf6c15ac2a559cc7%3Bf=net/bridge/br_ioctl.c
- 23252 third-party-advisory
- 23474 third-party-advisory
- http://projects.info-pull.com/mokb/MOKB-29-11-2006.html
- DSA-1233 vendor-advisory
- 23370 third-party-advisory
- 23997 third-party-advisory
- 21353 vdb-entry
- 24547 third-party-advisory
- MDKSA-2007:002 vendor-advisory
- USN-395-1 vendor-advisory
- 20061206 rPSA-2006-0226-1 kernel mailing-list
- linux-getfdbentries-integer-overflow(30588) vdb-entry