CVE-2009-2910: Canonical Ubuntu Linux

Low severity, CVSS 2.1. EPSS: 0.4% chance of exploitation in the next 30 days.

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: version 6.06 only; version 8.04 only; version 8.10 only; version 9.04 only; version 9.10 only
• Fedoraproject Fedora: version 10 only
• Linux Linux Kernel: before 2.6.31.4 (fixed in 2.6.31.4)
• Opensuse Opensuse: version 11.0 only
• Red Hat Enterprise Linux Desktop: version 5.0 only
• Red Hat Enterprise Linux Eus: version 5.4 only
• Red Hat Enterprise Linux Server: version 5.0 only
• Red Hat Enterprise Linux Workstation: version 5.0 only
• Red Hat Virtualization: version 5 only
• Suse Linux Enterprise Debuginfo: version 10 only
• Suse Linux Enterprise Desktop: version 10 only
• Suse Linux Enterprise Server: version 9 only; version 10 only
• Suse Linux Enterprise Software Development Kit: version 10 only

Published 2009-10-20. Last modified 2026-06-16.