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CVE-2009-4131

7.2 · HIGH

The EXT4_IOC_MOVE_EXT (aka move extents) ioctl implementation in the ext4 filesystem in the Linux kernel before 2.6.32-git6 allows local users to overwrite arbitrary files via a crafted request, re…

Published Dec 13, 2009linuxCWE-264EPSS 0.79%

Overview

CVE-2009-4131 is a high-severity vulnerability affecting linux linux_kernel. It was published on December 13, 2009 and has a CVSS 2.0 base score of 7.2 (HIGH).

This vulnerability has a CVSS 2.0 base score of 7.2, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

The EXT4_IOC_MOVE_EXT (aka move extents) ioctl implementation in the ext4 filesystem in the Linux kernel before 2.6.32-git6 allows local users to overwrite arbitrary files via a crafted request, related to insufficient checks for file permissions.

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
linuxlinux_kernel0Affected

References

Refgit.kernel.org/?p=linux/kernel/git/tytso/ext4.git%3Ba=commit%3Bh=4a58579b9e4e2a35d57e6c9c8483e52f6f1b7fd6Reflists.opensuse.org/opensuse-security-announce/2010-01/msg00000.htmlReflkml.org/lkml/2009/12/9/255Refsecunia.com/advisories/37658Refsecunia.com/advisories/37686Refsecunia.com/advisories/38017Refwww.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.32-git6.logRefwww.mandriva.com/security/advisories?name=MDVSA-2009:329Refwww.securityfocus.com/bid/37277Refwww.theregister.co.uk/2009/12/11/linux_kernel_bugs_patched/

How CyberStrike helps

Frequently asked questions

What is CVE-2009-4131?

CVE-2009-4131 is a high-severity vulnerability affecting linux linux_kernel. It was published on December 13, 2009 and has a CVSS 2.0 base score of 7.2 (HIGH).

How severe is CVE-2009-4131?

This vulnerability has a CVSS 2.0 base score of 7.2, rated HIGH. 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-2009-4131?

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-2009-4131?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-4131 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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