CVE-2026-68322

kernel: rds: Fix inet6_addr_lst NULL dereference when IPv6 is disabled

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · August 10, 2026

Updated · August 31, 2026

Description

A flaw was found in the Linux kernel's Reliable Datagram Sockets (RDS) component. A local user can trigger a null pointer dereference by attempting to bind an RDS socket to an IPv6 address when IPv6 is explicitly disabled. This can lead to a system crash, resulting in a Denial of Service (DoS).

Statement

This issue affects RDS sockets when IPv6 is disabled at boot (ipv6.disable=1). Binding to IPv6 addresses NULL-dereferences inet6_addr_lst. Systems with IPv6 enabled or not using RDS are not affected.

CVSS score applicability

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

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-476 · NULL Pointer Dereference