CVE-2026-31495

medium Red Hat
CVSS v3 Base Score
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Characteristics
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Published: April 22, 2026 (22 days ago)
Last Modified: April 22, 2026
Vendor: Red Hat
Source: REDHAT

Description

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.

CWE

CWE-1287

Affected Products

Red Hat Enterprise Linux 10Red Hat Enterprise Linux 6Red Hat Enterprise Linux 7Red Hat Enterprise Linux 8Red Hat Enterprise Linux 9

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 lore.kernel.org