CVE-2026-43500

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> rxrpc: Also unshare DATA/RESPONSE packets when paged frags are present<br /> <br /> The DATA-packet handler in rxrpc_input_call_event() and the RESPONSE<br /> handler in rxrpc_verify_response() copy the skb to a linear one before<br /> calling into the security ops only when skb_cloned() is true. An skb<br /> that is not cloned but still carries externally-owned paged fragments<br /> (e.g. SKBFL_SHARED_FRAG set by splice() into a UDP socket via<br /> __ip_append_data, or a chained skb_has_frag_list()) falls through to<br /> the in-place decryption path, which binds the frag pages directly into<br /> the AEAD/skcipher SGL via skb_to_sgvec().<br /> <br /> Extend the gate to also unshare when skb_has_frag_list() or<br /> skb_has_shared_frag() is true. This catches the splice-loopback vector<br /> and other externally-shared frag sources while preserving the<br /> zero-copy fast path for skbs whose frags are kernel-private (e.g. NIC<br /> page_pool RX, GRO). The OOM/trace handling already in place is reused.