CVE-2012-6657: Linux Kernel

Medium severity, CVSS 4.9. EPSS: 0.5% chance of exploitation in the next 30 days.

The sock_setsockopt function in net/core/sock.c in the Linux kernel before 3.5.7 does not ensure that a keepalive action is associated with a stream socket, which allows local users to cause a denial of service (system crash) by leveraging the ability to create a raw socket.

Affected products

• Linux Linux Kernel: up to and including 3.5.6; version 3.5.1 only; version 3.5.2 only; version 3.5.3 only; version 3.5.4 only; version 3.5.5 only
• Novell Suse Linux Enterprise Server: version 10.0 only; version 11.0 only

Published 2014-09-28. Last modified 2026-06-16.