CVE-2018-10938: Canonical Ubuntu Linux

Medium severity, CVSS 5.9. EPSS: 5% chance of exploitation in the next 30 days.

A flaw was found in the Linux kernel present since v4.0-rc1 and through v4.13-rc4. A crafted network packet sent remotely by an attacker may force the kernel to enter an infinite loop in the cipso_v4_optptr() function in net/ipv4/cipso_ipv4.c leading to a denial-of-service. A certain non-default configuration of LSM (Linux Security Module) and NetLabel should be set up on a system before an attacker could leverage this flaw.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only
• Debian Debian Linux: version 9.0 only
• Linux Linux Kernel: version 4.0 only; version 4.1 only; version 4.2 only; version 4.3 only; version 4.4 only; version 4.5 only; …

Published 2018-08-27. Last modified 2026-06-17.