Linux Kernel CVE-2026-31565

The primary fix is upgrading the Linux kernel to the appropriate patched stable release for your branch: 5.15.203, 6.1.168, 6.6.131, 6.12.80, 6.18.21, 6.19.11, or 7.0. Upstream fix commits are published at git.kernel.org/stable (see reference links for each branch). Ubuntu users should apply the update from USN-8567-1 at https://ubuntu.com/security/notices/USN-8567-1. Siemens product users should follow guidance in SSA-019113 and SSA-082556. If immediate patching is not feasible, the most effective compensating control is to operationally quiesce all active RDMA/iWARP connections (terminate rping and equivalent workloads) before performing any netdev reset on affected Intel ice/irdma interfaces - this prevents the circular wait from forming. Trade-off: this requires coordination between network administrators and RDMA application owners, which may be impractical or disruptive in automated HPC environments. Alternatively, scheduling maintenance windows so that netdev resets occur only when no RDMA sessions are active provides equivalent protection. Disabling the irdma module entirely prevents the deadlock but eliminates all RDMA functionality.