CVE-2026-68302

A flaw was found in the Linux kernel's Adjacency Management Protocol (AMT) implementation. Several AMT receive and transmit paths improperly cache pointers to socket buffer (skb) headers. When a helper function reallocates the skb head, these cached pointers become invalid, leading to a use-after-free vulnerability. An attacker could potentially exploit this flaw to cause a denial of service or achieve arbitrary code execution.

This vulnerability does not affect supported Red Hat Enterprise Linux releases because the Automatic Multicast Tunneling driver is not enabled or included in enterprise kernel builds. The issue stems from stale buffer pointer dereferences in the upstream tunneling implementation during packet processing, which could otherwise allow network-based denial of service. Because the vulnerable code is absent from default and supported Red Hat configurations, the operational risk to Red Hat environments is negligible.