CVE-2026-98196
Description
AI Translation Available
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.
https://git.kernel.org/stable/c/050d2486e8ed2c0a23b87249ccd23e8072721391
https://git.kernel.org/stable/c/10eeb0b29fd7f52487c9ae573e8d79c210a0095d
https://git.kernel.org/stable/c/1edb3ddd261e973a4d577c0547e63bfa25a8170d
https://git.kernel.org/stable/c/1eeca1d5e0920fbdad6449768fd2d4364e714180
https://git.kernel.org/stable/c/2a4841ff0b74b495cddd31ae324e922217fc2f13
https://git.kernel.org/stable/c/74acccc928851f69184271832d690607877122af
https://git.kernel.org/stable/c/777cb6bba59e875b16a1d8897a483a5fecfcd5d2
https://git.kernel.org/stable/c/856dabd5f2617efb23c043be9e1b22a9e6e97c41