CVE-2009-0745

Severity: medium (CVSS 4.9 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-02-27 · updated 2026-06-16
Weakness: CWE-20

Description

The ext4_group_add function in fs/ext4/resize.c in the Linux kernel 2.6.27 before 2.6.27.19 and 2.6.28 before 2.6.28.7 does not properly initialize the group descriptor during a resize (aka resize2fs) operation, which might allow local users to cause a denial of service (OOPS) by arranging for crafted values to be present in available memory.

Affected products

Linux kernel: 2.6.27, 2.6.27.1, 2.6.27.2, 2.6.27.3, 2.6.27.4, 2.6.27.5 (+20)

References

http://bugzilla.kernel.org/show_bug.cgi?id=12433
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fdff73f094e7220602cc3f8959c7230517976412
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.19
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.28.7
http://rhn.redhat.com/errata/RHSA-2009-1243.html
http://secunia.com/advisories/34394
http://secunia.com/advisories/34981
http://secunia.com/advisories/36562
http://secunia.com/advisories/37471
http://www.debian.org/security/2009/dsa-1749
http://www.debian.org/security/2009/dsa-1787
http://www.securityfocus.com/archive/1/507985/100/0/threaded

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