Rapid7

vulnerability

Red Hat: CVE-2017-18017: Important: kernel-rt security, bug fix, and enhancement update (Multiple Advisories)

Severity
10
CVSS
(AV:N/AC:L/Au:N/C:C/I:C/A:C)
Published
Jan 3, 2018
Added
Apr 11, 2018
Modified
Feb 19, 2026

Description

The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before 4.11, and 4.9.x before 4.9.36, allows remote attackers to cause a denial of service (use-after-free and memory corruption) or possibly have unspecified other impact by leveraging the presence of xt_TCPMSS in an iptables action.

Solutions

redhat-upgrade-kernelredhat-upgrade-kernel-rt
Title
Rapid7 Labs

2026 Global Threat Landscape Report

The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.