In the Linux kernel, the following vulnerability has been resolved:
net/sched: taprio: always validate TCA_TAPRIO_ATTR_PRIOMAP
If one TCA_TAPRIO_ATTR_PRIOMAP attribute has been provided,
taprio_parse_mqprio_opt() must validate it, or userspace
can inject arbitrary data to the kernel, the second time
taprio_change() is called.
First call (with valid attributes) sets dev->num_tc
to a non zero value.
Second call (with arbitrary mqprio attributes)
returns early from taprio_parse_mqprio_opt()
and bad things can happen.
git.kernel.org/stable/c/0bf6cc96612bd396048f57d63f1ad454a846e39c
git.kernel.org/stable/c/6db4af09987cc5d5f0136bd46148b0e0460dae5b
git.kernel.org/stable/c/724050ae4b76e4fae05a923cb54101d792cf4404
git.kernel.org/stable/c/c37a27a35eadb59286c9092c49c241270c802ae2
git.kernel.org/stable/c/c6041e7124464ce7e896ee3f912897ce88a0c4ec
git.kernel.org/stable/c/d3dde4c217f0c31ab0621912e682b57e677dd923
git.kernel.org/stable/c/f921a58ae20852d188f70842431ce6519c4fdc36