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CVE-2009-4308

7.1 · HIGH

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 dereferen…

Published Dec 13, 2009linuxCWE-399EPSS 3.47%

Overview

CVE-2009-4308 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 7.1 (HIGH).

This vulnerability has a CVSS 2.0 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

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/torvalds/linux-2.6.git%3Ba=commit%3Bh=78f1ddbb498283c2445c11b0dfa666424c301803Reflists.opensuse.org/opensuse-security-announce/2010-01/msg00000.htmlReflists.opensuse.org/opensuse-security-announce/2010-01/msg00005.htmlReflists.opensuse.org/opensuse-security-announce/2010-02/msg00005.htmlRefsecunia.com/advisories/37658Refsecunia.com/advisories/38017Refsecunia.com/advisories/38276Refsecunia.com/advisories/43315Refwww.debian.org/security/2010/dsa-2005Refwww.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.32

How CyberStrike helps

Frequently asked questions

What is CVE-2009-4308?

CVE-2009-4308 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 7.1 (HIGH).

How severe is CVE-2009-4308?

This vulnerability has a CVSS 2.0 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2009-4308?

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-2009-4308?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-4308 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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