CVE-2026-98561

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

nfp: hold IPsec RX state under the XArray lock

nfp net ipsec rx() drops the XArray lock before taking a reference to the xfrm state it found. The delete path can erase the entry and drop the last state reference in that interval. RX can then try to increment a zero refcount after the state has been queued for destruction.

The driver queues firmware invalidation asynchronously; the delete path does not wait for the command to complete or drain pending RX processing.

The XFRM garbage collector waits for an RCU grace period before freeing the state. That delays reclamation but does not make acquiring a reference from zero valid.

Take the xfrm state reference before releasing the XArray lock so xa erase() cannot run between lookup and reference acquisition.