Description
The tcf_fill_node function in net/sched/cls_api.c in the netlink subsystem in the Linux kernel 2.6.x before 2.6.32-rc5, and 2.4.37.6 and earlier, does not initialize a certain tcm__pad2 structure member, which might allow local users to obtain sensitive information from kernel memory via unspecified vectors. NOTE: this issue exists because of an incomplete fix for CVE-2005-4881.
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 5.0 | linux-2.6 | 2.6.26-19lenny2 | DSA-1927-1 |
| Debian 4.0 | linux-2.6 | 2.6.18.dfsg.1-26etch1 | DSA-1929-1 |
| Debian 4.0 | linux-2.6.24 | 2.6.24-6~etchnhalf.9etch1 | DSA-1928-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | kernel +12 | 2.6.18-164.9.1.el5 | RHSA-2009:1670 |
| RHEL 4 | kernel +10 | 2.6.9-89.0.15.EL | RHSA-2009:1522 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 1 | kernel-rt +9 | 2.6.24.7-137.el5rt | RHSA-2009:1540 |
Advisories 6
- RHSA-2009:1540 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2009:1670 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2009:1522 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1929-1 linux-2.6 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1927-1 linux-2.6 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1928-1 linux-2.6.24 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ad61df918c44316940404891d5082c63e79c256a
- http://patchwork.ozlabs.org/patch/35412/
- RHSA-2009:1540 vendor-advisory
- SUSE-SA:2009:061 vendor-advisory
- USN-864-1 vendor-advisory
- 38794 third-party-advisory
- [security-announce] 20100303 VMSA-2010-0004 ESX Service Console and vMA third party updates mailing-list
- [oss-security] 20091014 CVE request kernel: tcf_fill_node() infoleak due to typo in 9ef1d4c7 mailing-list
- MDVSA-2009:329 vendor-advisory
- SUSE-SA:2010:012 vendor-advisory
- [oss-security] 20091014 Re: CVE request kernel: tcf_fill_node() infoleak due to typo in 9ef1d4c7 mailing-list
- 37909 third-party-advisory
- RHSA-2009:1670 vendor-advisory
- SUSE-SA:2009:064 vendor-advisory
- 38834 third-party-advisory
- [oss-security] 20091014 Re: CVE request: kernel: tc: uninitialised kernel memory leak mailing-list
- [oss-security] 20091015 Re: CVE request kernel: tcf_fill_node() infoleak due to typo in 9ef1d4c7 mailing-list
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc5
- https://bugzilla.redhat.com/show_bug.cgi?id=528868
- 37086 third-party-advisory
- oval:org.mitre.oval:def:10395 vdb-entry signature
- oval:org.mitre.oval:def:7557 vdb-entry signature
- FEDORA-2009-11038 vendor-advisory
- ADV-2010-0528 vdb-entry