Description
The actions implementation in the network queueing functionality in the Linux kernel before 2.6.36-rc2 does not properly initialize certain structure members when performing dump operations, which allows local users to obtain potentially sensitive information from kernel memory via vectors related to (1) the tcf_gact_dump function in net/sched/act_gact.c, (2) the tcf_mirred_dump function in net/sched/act_mirred.c, (3) the tcf_nat_dump function in net/sched/act_nat.c, (4) the tcf_simp_dump function in net/sched/act_simple.c, and (5) the tcf_skbedit_dump function in net/sched/act_skbedit.c.
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 +12 | 2.6.18-194.17.1.el5 | RHSA-2010:0723 |
| RHEL 4 | kernel +10 | 2.6.9-89.31.1.EL | RHSA-2010:0779 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 1 | perf +10 | 2.6.33.7-rt29.45.el5rt | RHSA-2010:0771 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | kernel-source | 4.8.13-1.1 | openSUSE-SU-2024:10128-1 |
Advisories 4
- RHSA-2010:0723 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2010:0779 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- openSUSE-SU-2024:10128-1 kernel-debug-4.8.13-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2010:0771 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jan 14, 2026
References
- https://bugzilla.redhat.com/show_bug.cgi?id=624903
- RHSA-2010:0723 vendor-advisory
- USN-1000-1 vendor-advisory
- SUSE-SA:2010:041 vendor-advisory
- RHSA-2010:0771 vendor-advisory
- 20111013 VMSA-2011-0012 VMware ESXi and ESX updates to third party libraries and ESX Service Console mailing-list
- 46397 third-party-advisory
- http://git.kernel.org/?p=linux/kernel/git/davem/net-2.6.git%3Ba=commit%3Bh=1c40be12f7d8ca1d387510d39787b12e512a7ce8
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.36-rc2
- SUSE-SA:2010:040 vendor-advisory
- ADV-2010-2430 vdb-entry
- SUSE-SA:2011:007 vendor-advisory
- SUSE-SA:2010:060 vendor-advisory
- ADV-2011-0298 vdb-entry
- http://patchwork.ozlabs.org/patch/61857/
- http://www.vmware.com/security/advisories/VMSA-2011-0012.html
- http://support.avaya.com/css/P8/documents/100113326
- [oss-security] 20100818 CVE request - kernel: net sched memleak mailing-list
- 42529 vdb-entry
- [oss-security] 20100819 Re: CVE request - kernel: net sched memleak mailing-list
- SUSE-SA:2010:054 vendor-advisory
- 41512 third-party-advisory
- RHSA-2010:0779 vendor-advisory