Linux Kernel CVE-2026-43446

The vendor-released patches are available in Linux 6.19.9 and Linux 7.0; administrators running affected 6.19.x kernels should upgrade to 6.19.9 or later, and those on mainline development branches should apply the fix commit 6b13cb8f48a42ddf6dd98865b673a82e37ff238b. Patch commits are accessible at https://git.kernel.org/stable/c/ac72e7385a2c7533dd766de4197134d96230be85 (stable 6.19 branch) and https://git.kernel.org/stable/c/6b13cb8f48a42ddf6dd98865b673a82e37ff238b (mainline). As a compensating control where patching is immediately impractical, administrators can unload or blacklist the amdxdna kernel module (modprobe -r amdxdna; echo 'blacklist amdxdna' >> /etc/modprobe.d/blacklist.conf), which disables AMD XDna accelerator functionality entirely - acceptable on systems where NPU workloads are non-critical. Alternatively, disabling kernel runtime power management for the affected device via the sysfs power/control interface (echo 'on' > /sys/bus/pci/devices/<BDF>/power/control) prevents the runtime suspend path from being entered, eliminating the deadlock trigger at the cost of increased idle power consumption.