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.