What’s Vulnerable › Vulnerabilities

CVE-2010-4165

• Severity: medium (CVSS 4.9 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2010-11-22 · updated 2026-06-16
• Weakness: CWE-369

Description

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 kernel: before 2.6.37; 2.6.37, 2.6.37-rc1 — fixed in 2.6.37
• Opensuse: 11.2, 11.3
• SUSE Linux Enterprise Server 15 SP1: 11-sp1
• SUSE Linux Enterprise Real Time Extension: 11-sp1
• SUSE Linux Enterprise Server: 11-sp1

How to fix

Upgrade to a fixed version: Linux kernel 2.6.37. Check the vendor advisory for mitigations.

References

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=7a1abd08d52fdeddb3e9a5a33f2f15cc6a5674d2
• http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00000.html
• http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00001.html
• http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00004.html
• http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html
• http://secunia.com/advisories/42778
• http://secunia.com/advisories/42801
• http://secunia.com/advisories/42932
• http://securityreason.com/securityalert/8111
• http://securityreason.com/securityalert/8123
• http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.37-rc2
• http://www.mandriva.com/security/advisories?name=MDVSA-2011:029

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