CVE-2008-4539: Canonical Ubuntu Linux

High severity, CVSS 7.2. EPSS: 0.5% chance of exploitation in the next 30 days.

Heap-based buffer overflow in the Cirrus VGA implementation in (1) KVM before kvm-82 and (2) QEMU on Debian GNU/Linux and Ubuntu might allow local users to gain privileges by using the VNC console for a connection, aka the LGD-54XX "bitblt" heap overflow. NOTE: this issue exists because of an incorrect fix for CVE-2007-1320.

Affected products

• Canonical Ubuntu Linux: version 8.04 only; version 8.10 only
• Debian Debian Linux: version 4.0 only; version 5.0 only
• Kvm Qumranet Kvm: up to and including 81
• Qemu Qemu: before 0.10.0 (fixed in 0.10.0)

Published 2008-12-29. Last modified 2026-06-16.