CVE-2009-3547: Canonical Ubuntu Linux

High severity, CVSS 7.0. EPSS: 4.9% chance of exploitation in the next 30 days.

Multiple race conditions in fs/pipe.c in the Linux kernel before 2.6.32-rc6 allow local users to cause a denial of service (NULL pointer dereference and system crash) or gain privileges by attempting to open an anonymous pipe via a /proc/*/fd/ pathname.

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: up to and including 2.6.31.14; version 2.6.32 only
• Novell Linux Desktop: version 9 only
• Opensuse Opensuse: version 11.0 only; version 11.2 only
• Red Hat Enterprise Linux Desktop: version 3.0 only; version 4.0 only; version 5.0 only
• Red Hat Enterprise Linux Eus: version 4.8 only; version 5.4 only
• Red Hat Enterprise Linux Server: version 3.0 only; version 4.0 only; version 5.0 only
• Red Hat Enterprise Linux Workstation: version 3.0 only; version 4.0 only; version 5.0 only
• Red Hat Mrg Realtime: version 1.0 only
• Suse Suse Linux Enterprise Desktop: version 10 only
• Suse Suse Linux Enterprise Server: version 10 only
• VMware Esx: version 4.0 only
• VMware Vma: version 4.0 only

Published 2009-11-04. Last modified 2026-06-16.