CVE-2026-43084

A flaw was found in the Linux kernel's netfilter component. This vulnerability, a use-after-free, occurs due to the sharing of a global hash table among all queues in nfnetlink_queue. This allows a parallel CPU to access a nf_queue_entry after it has been freed, leading to a system crash and a Denial of Service (DoS).

Red Hat acknowledges the upstream Linux kernel correction for «netfilter» as described in COMMENT_ZERO. Fixes are delivered through standard kernel errata for supported products. Operational exposure depends on whether this subsystem or driver is active in your configuration.

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.