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CVE-2009-2692

7.8 · HIGH

The Linux kernel 2.6.0 through 2.6.30.4, and 2.4.4 through 2.4.37.4, does not initialize all function pointers for socket operations in proto_ops structures, which allows local users to trigger a N…

Published Aug 14, 2009linuxCWE-908EPSS 14.63%

Overview

CVE-2009-2692 is a high-severity vulnerability affecting linux linux_kernel. It was published on August 14, 2009 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

The Linux kernel 2.6.0 through 2.6.30.4, and 2.4.4 through 2.4.37.4, does not initialize all function pointers for socket operations in proto_ops structures, which allows local users to trigger a NULL pointer dereference and gain privileges by using mmap to map page zero, placing arbitrary code on this page, and then invoking an unavailable operation, as demonstrated by the sendpage operation (sock_sendpage function) on a PF_PPPOX socket.

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_kernel>= 2.4.4, < 2.4.37.5Affected

References

Refarchives.neohapsis.com/archives/fulldisclosure/2009-08/0174.htmlRefblog.cr0.org/2009/08/linux-null-pointer-dereference-due-to.htmlRefgit.kernel.org/?p=linux/kernel/git/stable/linux-2.4.37.y.git%3Ba=commit%3Bh=c18d0fe535a73b219f960d1af3d0c264555a12e3Refgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=e694958388c50148389b0e9b9e9e8945cf0f1b98Refgrsecurity.net/~spender/wunderbar_emporium.tgzReflists.opensuse.org/opensuse-security-announce/2009-09/msg00001.htmlRefrhn.redhat.com/errata/RHSA-2009-1222.htmlRefrhn.redhat.com/errata/RHSA-2009-1223.htmlRefsecunia.com/advisories/36278Refsecunia.com/advisories/36289

How CyberStrike helps

Frequently asked questions

What is CVE-2009-2692?

CVE-2009-2692 is a high-severity vulnerability affecting linux linux_kernel. It was published on August 14, 2009 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2009-2692?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2009-2692?

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-2009-2692?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-2692 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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