CVE-2011-1593: Canonical Ubuntu Linux

Medium severity, CVSS 4.9. EPSS: 0.6% chance of exploitation in the next 30 days.

Multiple integer overflows in the next_pidmap function in kernel/pid.c in the Linux kernel before 2.6.38.4 allow local users to cause a denial of service (system crash) via a crafted (1) getdents or (2) readdir system call.

Affected products

• Canonical Ubuntu Linux: version 8.04 only
• Linux Linux Kernel: before 2.6.38.4 (fixed in 2.6.38.4)
• Red Hat Enterprise Linux: version 5.0 only
• Red Hat Enterprise Linux Aus: version 5.6 only
• Red Hat Enterprise Linux Desktop: version 5.0 only
• Red Hat Enterprise Linux Eus: version 5.6 only
• Red Hat Enterprise Linux Server: version 5.0 only
• Red Hat Enterprise Linux Workstation: version 5.0 only

Published 2011-05-03. Last modified 2026-06-16.