CVE-2012-2136 Memory corruption in n/a

What is CVE-2012-2136?

CVE-2012-2136 is a high-severity memory corruption vulnerability in Linux kernel, published on 9 Aug 2012. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-20

Which versions are affected by CVE-2012-2136?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2012-2136?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2012-2136 being exploited?

There is no known exploitation of CVE-2012-2136 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2012-2136, GHSA-5f6p-hhwm-3p3h, RHSA-2012:0690, RHSA-2012:1087.