CVE-2009-4308: Linux Kernel

High severity, CVSS 7.1. EPSS: 3.5% chance of exploitation in the next 30 days.

The ext4_decode_error function in fs/ext4/super.c in the ext4 filesystem in the Linux kernel before 2.6.32 allows user-assisted remote attackers to cause a denial of service (NULL pointer dereference), and possibly have unspecified other impact, via a crafted read-only filesystem that lacks a journal.

Affected products

• Linux Linux Kernel: up to and including 2.6.31; version 2.6.0 only; version 2.6.1 only; version 2.6.2 only; version 2.6.3 only; version 2.6.4 only; …

Published 2009-12-13. Last modified 2026-06-16.