CVE-2026-23242 RDMA/siw: Fix potential NULL pointer dereference in header processing

In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Fix potential NULL pointer dereference in header processing If siwgethdr returns -EINVAL before setrxfpducontext, qp-rxfpdu can be NULL. The error path in siwtcprxdata dereferences qp-rxfpdu-moreddpsegs without checking...