CVE-2026-68140
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
net/iucv: fix use-after-free of a severed iucv_path
af_iucv queues not-yet-received message notifications on iucv->message_q,
each holding a raw pointer to the connection's iucv_path. When the peer
severs the connection, iucv_sever_path() frees that path with
iucv_path_free() but leaves the notifications queued. A later recvmsg()
drains message_q via iucv_process_message_q() and hands the stale path to
message_receive() -- a use-after-free of the freed iucv_path.
Drop the queued notifications when the path is severed; once the path is
gone they can no longer be received. This also frees the notifications
leaked when a socket is closed with messages still queued.
https://git.kernel.org/stable/c/23658b350b4107e8292045c2044983fd426fa15d
https://git.kernel.org/stable/c/900cd6d8119b7f3ae5c4bf82f922ff5957df43db
https://git.kernel.org/stable/c/a5bbaddf69853117f28173c3f5c8fc14c6b2ec82
https://git.kernel.org/stable/c/be7cc4656eb1f54029610e82d1f0fdd3f9b5ec0a
https://git.kernel.org/stable/c/f579582c03ed526281a8450159baf1d35099a85f