CVE-2026-89564

CVE-2026-89564 is a use-after-free in the Linux kernel 's IP multicast forwarding path. When a socket prefetched by BPF (bpf_sk_assign) or UDP early demux is destroyed before the skb is freed, a later call to sock_pfree() dereferences the stale skb->sk pointer. Both IPv4 and IPv6 are affected:...