CVE-2026-98261

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

cifs: Fix server use-after-free in cifs_chan_skip_or_disable()

When a secondary channel is no longer supported by the server,

cifs_chan_skip_or_disable() drops the channel reference with

cifs_put_tcp_session() and then continues to use the server pointer by

calling cifs_signal_cifsd_for_reconnect() on it and reading its

primary_server pointer. cifs_put_tcp_session() can drop the last

reference of the channel and tear it down, so both the channel and the

primary server (whose reference is also dropped by

cifs_put_tcp_session()) can be freed before they are signaled for

reconnect.

Signal the channel and the primary server and capture the primary

server pointer before dropping the channel reference with

cifs_put_tcp_session().