CVE-2018-17977: Linux Kernel

Medium severity, CVSS 4.4. EPSS: 0.4% chance of exploitation in the next 30 days.

The Linux kernel 4.14.67 mishandles certain interaction among XFRM Netlink messages, IPPROTO_AH packets, and IPPROTO_IP packets, which allows local users to cause a denial of service (memory consumption and system hang) by leveraging root access to execute crafted applications, as demonstrated on CentOS 7.

Affected products

• Linux Linux Kernel: version 4.14.67 only

Published 2018-10-08. Last modified 2026-06-17.