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CVE-2009-0745

4.9 · MEDIUM

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 resize2…

Published Feb 27, 2009linuxCWE-20EPSS 0.41%

Overview

CVE-2009-0745 is a medium-severity vulnerability affecting linux linux_kernel. It was published on February 27, 2009 and has a CVSS 2.0 base score of 4.9 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 4.9, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refbugzilla.kernel.org/show_bug.cgi?id=12433Refgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fdff73f094e7220602cc3f8959c7230517976412Refkernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.19Refkernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.28.7Refrhn.redhat.com/errata/RHSA-2009-1243.htmlRefsecunia.com/advisories/34394Refsecunia.com/advisories/34981Refsecunia.com/advisories/36562Refsecunia.com/advisories/37471Refwww.debian.org/security/2009/dsa-1749

How CyberStrike helps

Frequently asked questions

What is CVE-2009-0745?

CVE-2009-0745 is a medium-severity vulnerability affecting linux linux_kernel. It was published on February 27, 2009 and has a CVSS 2.0 base score of 4.9 (MEDIUM).

How severe is CVE-2009-0745?

This vulnerability has a CVSS 2.0 base score of 4.9, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2009-0745?

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2009-0745?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-0745 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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