CVE-2008-4934: Canonical Ubuntu Linux

High severity, CVSS 7.8. EPSS: 3.3% chance of exploitation in the next 30 days.

The hfsplus_block_allocate function in fs/hfsplus/bitmap.c in the Linux kernel before 2.6.28-rc1 does not check a certain return value from the read_mapping_page function before calling kmap, which allows attackers to cause a denial of service (system crash) via a crafted hfsplus filesystem image.

Affected products

• Canonical Ubuntu Linux: version 6.06 only; version 7.10 only; version 8.04 only; version 8.10 only
• Debian Debian Linux: version 4.0 only
• Linux Linux Kernel: before 2.6.28 (fixed in 2.6.28)

Published 2008-11-05. Last modified 2026-06-16.