CVE-2026-31495

A flaw was found in the Linux kernel's netfilter connection tracking (ctnetlink) component. This vulnerability, related to improper input validation, allows an attacker to provide malformed netlink policy attributes. Specifically, invalid values for TCP window scaling (WSCALE) could lead to undefined behavior within the kernel. This could result in a system crash, causing a Denial of Service (DoS) for affected systems.

This Moderate-impact flaw in the Linux kernel's netfilter connection tracking (ctnetlink) component could lead to a system crash. A local attacker with low privileges could exploit improper input validation by providing malformed netlink policy attributes, specifically invalid TCP window scaling values, resulting in a Denial of Service.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.