CVE-2009-4308

Severity: high (CVSS 7.1 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-12-13 · updated 2026-06-16
Weakness: CWE-399

Description

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 kernel: through 2.6.31; 2.6.0, 2.6.1, 2.6.2, 2.6.3, 2.6.4, 2.6.5 (+324)

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=78f1ddbb498283c2445c11b0dfa666424c301803
http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00005.html
http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00005.html
http://secunia.com/advisories/37658
http://secunia.com/advisories/38017
http://secunia.com/advisories/38276
http://secunia.com/advisories/43315
http://www.debian.org/security/2010/dsa-2005
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.32
http://www.mandriva.com/security/advisories?name=MDVSA-2010:198
http://www.redhat.com/support/errata/RHSA-2010-0147.html

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