CVE-2010-4165: Linux Kernel

Medium severity, CVSS 4.9. EPSS: 1.5% chance of exploitation in the next 30 days.

The do_tcp_setsockopt function in net/ipv4/tcp.c in the Linux kernel before 2.6.37-rc2 does not properly restrict TCP_MAXSEG (aka MSS) values, which allows local users to cause a denial of service (OOPS) via a setsockopt call that specifies a small value, leading to a divide-by-zero error or incorrect use of a signed integer.

Affected products

• Linux Linux Kernel: before 2.6.37 (fixed in 2.6.37); version 2.6.37 only
• Opensuse Opensuse: version 11.2 only; version 11.3 only
• Suse Linux Enterprise Desktop: version 11 only
• Suse Linux Enterprise Real Time Extension: version 11 only
• Suse Linux Enterprise Server: version 11 only

Published 2010-11-22. Last modified 2026-06-16.