CVE-2026-98196

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

wifi: brcmsmac: fix UAF in brcms_free_timer()

brcms_free_timer() calls brcms_del_timer() which uses the non-synchronous

cancel_delayed_work() to cancel the timer's underlying delayed work. If

the work callback (_brcms_timer) is already running, cancel_delayed_work()

returns false without waiting, and brcms_free_timer() proceeds to kfree(t)

while the callback still accesses t through container_of().

Add an explicit cancel_delayed_work_sync() after brcms_del_timer() to

guarantee that any in-flight callback has completed before the timer

structure is freed.