CVE-2025-21809

In the Linux kernel, the following vulnerability has been resolved: rxrpc, afs: Fix peer hash locking vs RCU callback In its address list, afs now retains pointers to and refs on one or more rxrpcpeer objects. The address list is freed under RCU and at this time, it puts the refs on those peers...

CVE-2025-21809 rxrpc, afs: Fix peer hash locking vs RCU callback

In the Linux kernel, the following vulnerability has been resolved: rxrpc, afs: Fix peer hash locking vs RCU callback In its address list, afs now retains pointers to and refs on one or more rxrpcpeer objects. The address list is freed under RCU and at this time, it puts the refs on those peers...

CVE-2025-21809

Summary of CVE-2025-21809: In the Linux kernel, a race/lock order issue occurred in the RXRPC/AFS path. The afs address list held refs to rxrpc_peer objects and freed under RCU while a non-BH context could call into rxrpc_put_peer, risking deadlock when rxnet->peer_hash_lock (a spinlock) was h...