What’s Vulnerable › Vulnerabilities
CVE-2009-2910
- Severity: low (CVSS 2.1 v2.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2009-10-20 · updated 2026-06-16
- Weakness: CWE-200
Description
arch/x86/ia32/ia32entry.S in the Linux kernel before 2.6.31.4 on the x86_64 platform does not clear certain kernel registers before a return to user mode, which allows local users to read register values from an earlier process by switching an ia32 process to 64-bit mode.
Affected products
- Canonical Ubuntu Linux: 6.06, 8.04, 8.10, 9.04, 9.10
- Fedoraproject Fedora: 10
- Linux kernel: before 2.6.31.4 — fixed in 2.6.31.4
- Opensuse: 11.0
- RedHat Enterprise Linux Desktop: 5.0
- RedHat Enterprise Linux Eus: 5.4
- RedHat Enterprise Linux Server: 5.0
- RedHat Enterprise Linux Workstation: 5.0
- RedHat Virtualization: 5
- SUSE Linux Enterprise Debuginfo: 10-sp2
- SUSE Linux Enterprise Server 15 SP1: 10-sp2
- SUSE Linux Enterprise Server: 9, 10-sp2
- SUSE Linux Enterprise Software Development Kit: 10-sp2
How to fix
Upgrade to a fixed version: Linux kernel 2.6.31.4. Check the vendor advisory for mitigations.
References
- http://git.kernel.org/?p=linux/kernel/git/x86/linux-2.6-tip.git%3Ba=commit%3Bh=24e35800cdc4350fc34e2bed37b608a9e13ab3b6
- http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00005.html
- http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00007.html
- http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00005.html
- http://lkml.org/lkml/2009/10/1/164
- http://marc.info/?l=oss-security&m=125442304214452&w=2
- http://marc.info/?l=oss-security&m=125444390112831&w=2
- http://marc.info/?l=oss-security&m=125511635004768&w=2
- http://secunia.com/advisories/36927
- http://secunia.com/advisories/37075
- http://secunia.com/advisories/37351
- http://support.avaya.com/css/P8/documents/100073666
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