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CVE-2012-2136

7.2 · HIGH

The sock_alloc_send_pskb function in net/core/sock.c in the Linux kernel before 3.4.5 does not properly validate a certain length value, which allows local users to cause a denial of service (heap-…

Published Aug 9, 2012linuxCWE-20EPSS 0.56%

Overview

CVE-2012-2136 is a high-severity vulnerability affecting linux linux_kernel. It was published on August 9, 2012 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 sock_alloc_send_pskb function in net/core/sock.c in the Linux kernel before 3.4.5 does not properly validate a certain length value, which allows local users to cause a denial of service (heap-based buffer overflow and system crash) or possibly gain privileges by leveraging access to a TUN/TAP device.

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>= 0, < 3.0.37Affected

References

Refgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1ccRefrhn.redhat.com/errata/RHSA-2012-0743.htmlRefrhn.redhat.com/errata/RHSA-2012-1087.htmlRefsecunia.com/advisories/50807Refubuntu.com/usn/usn-1529-1Refwww.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.5Refwww.securityfocus.com/bid/53721Refwww.ubuntu.com/usn/USN-1535-1Refbugzilla.redhat.com/show_bug.cgi?id=816289GitHubgithub.com/torvalds/linux/commit/cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1cc

How CyberStrike helps

Frequently asked questions

What is CVE-2012-2136?

CVE-2012-2136 is a high-severity vulnerability affecting linux linux_kernel. It was published on August 9, 2012 and has a CVSS 2.0 base score of 7.2 (HIGH).

How severe is CVE-2012-2136?

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-2012-2136?

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-2012-2136?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2012-2136 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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