CVE-2026-64355

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> bpf: Reject fragmented frames in devmap<br /> <br /> Devmap broadcast redirects clone the packet for all but the last<br /> destination.<br /> <br /> For native XDP, that clone path copies only the linear xdp_frame data,<br /> while fragmented frames keep skb_shared_info in tailroom outside the<br /> linear area. Cloning such a frame leaves XDP_FLAGS_HAS_FRAGS set but<br /> without valid frag metadata, and the later free path can interpret<br /> uninitialized tail data as skb_shared_info, leading to an out-of-bounds<br /> access during frame return.<br /> <br /> Reject fragmented native XDP frames in dev_map_enqueue_clone().<br /> <br /> Add the same restriction to the generic XDP clone path in<br /> dev_map_redirect_clone(). Generic XDP represents fragmented packets as<br /> nonlinear skbs, and rejecting them here keeps clone-based broadcast<br /> support aligned between native and generic XDP.