CVE-2026-68419

The CVE-2026-68419 affects the Linux kernel RDMA/irdma subsystem. When a QP/CQ/SRQ is created, a two-step process allows user-space buffers to be registered with reg_mr via a special ABI flag indicating an invalid mkey. This can enable a user to call rereg_mr on these MR objects and trigger a rea...

CVE-2026-68419 RDMA/irdma: Prevent rereg_mr for non-mem regions

In the Linux kernel, the following vulnerability has been resolved: RDMA/irdma: Prevent reregmr for non-mem regions When a QP/CQ/SRQ is created, a two step process is used where the buffer is allocated in userspace and explicitly registered with the normal regmr mechanism prior to creating the...