CVE-2009-0748: Linux Kernel

Medium severity, CVSS 4.9. EPSS: 0.5% chance of exploitation in the next 30 days.

The ext4_fill_super function in fs/ext4/super.c in the Linux kernel 2.6.27 before 2.6.27.19 and 2.6.28 before 2.6.28.7 does not validate the superblock configuration, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) by attempting to mount a crafted ext4 filesystem.

Affected products

• Linux Linux Kernel: version 2.6.27 only; version 2.6.27.1 only; version 2.6.27.2 only; version 2.6.27.3 only; version 2.6.27.4 only; version 2.6.27.5 only; …

Published 2009-02-27. Last modified 2026-06-16.