CVE-2012-0879: Canonical Ubuntu Linux

Medium severity, CVSS 5.5. EPSS: 0.5% chance of exploitation in the next 30 days.

The I/O implementation for block devices in the Linux kernel before 2.6.33 does not properly handle the CLONE_IO feature, which allows local users to cause a denial of service (I/O instability) by starting multiple processes that share an I/O context.

Affected products

• Canonical Ubuntu Linux: version 10.04 only
• Debian Debian Linux: version 6.0 only
• Linux Linux Kernel: before 2.6.33 (fixed in 2.6.33)
• Suse Linux Enterprise Desktop: version 11 only
• Suse Linux Enterprise High Availability Extension: version 11 only
• Suse Linux Enterprise Server: version 11 only

Published 2012-05-17. Last modified 2026-06-16.