In the Linux kernel, the following vulnerability has been resolved: tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check() Use RCU to avoid a pair of atomic operations and a potential UAF on dst_dev()->flags.
https://git.kernel.org/stable/c/bc2b881a0896c111c1041d8bb1f92a3b3873ace5
https://git.kernel.org/stable/c/b62a59c18b692f892dcb8109c1c2e653b2abc95c
https://git.kernel.org/stable/c/06da08d9355bf8e2070459bbedbe372ccc02cc0e