CVE-2026-31399

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> nvdimm/bus: Fix potential use after free in asynchronous initialization<br /> <br /> Dingisoul with KASAN reports a use after free if device_add() fails in<br /> nd_async_device_register().<br /> <br /> Commit b6eae0f61db2 ("libnvdimm: Hold reference on parent while<br /> scheduling async init") correctly added a reference on the parent device<br /> to be held until asynchronous initialization was complete. However, if<br /> device_add() results in an allocation failure the ref count of the<br /> device drops to 0 prior to the parent pointer being accessed. Thus<br /> resulting in use after free.<br /> <br /> The bug bot AI correctly identified the fix. Save a reference to the<br /> parent pointer to be used to drop the parent reference regardless of the<br /> outcome of device_add().