CVE-2026-98354

In the Linux kernel, the following vulnerability has been resolved:

RDMA/mad: Fix receive buffer leak when PKey enforcement fails

ib_mad_complete_recv() initializes mad_recv_wc->rmpp_list and then runs

ib_mad_enforce_security() before linking recv_buf onto that list. On

failure it calls ib_free_recv_mad(), which only walks rmpp_list and frees

the ib_mad_private of every buffer found there. As the list is still

empty at that point, nothing is freed at all.

The caller cannot clean up either: ib_mad_recv_done() sets recv to NULL

right after ib_mad_complete_recv() returns, assuming the MAD layer took

ownership of the buffer. Every MAD that fails the PKey check therefore

leaks one ib_mad_private (about 300 bytes per IB port MAD, ~2K for OPA),

and a remote node can trigger this repeatedly by sending MADs with a

wrong PKey.

Link recv_buf onto rmpp_list right after the list is initialized, so the

error path has something to free.