CVE-2026-98015

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

net/mlx5: E-Switch: fix use-after-free in mlx5_eswitch_termtbl_put

In mlx5_eswitch_termtbl_put(), the zero-ref cleanup check reads

tt->ref_count after termtbl_mutex has been released. Two concurrent

callers on the same mlx5_termtbl_handle race: one decrements ref_count

to zero, removes the hash entry, and calls kfree(tt) while the other

has already dropped the mutex and is about to evaluate

if (!tt->ref_count), producing a use-after-free.

Fix this by capturing the result of the decrement into a stack-local

last variable before dropping the mutex. The cleanup decision is now

made entirely under termtbl_mutex, and tt is not touched after

kfree.