CVE-2012-2136: Linux Kernel

High severity, CVSS 7.2. EPSS: 0.6% chance of exploitation in the next 30 days.

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.

Affected products

• Linux Linux Kernel: before 3.0.37 (fixed in 3.0.37); from 3.1, before 3.2.23 (fixed in 3.2.23); from 3.3, before 3.4.5 (fixed in 3.4.5)

Published 2012-08-09. Last modified 2026-06-16.