In the Linux kernel, the following vulnerability has been resolved: block: avoid to reuse `hctx` not removed from cpuhp callback list If the 'hctx' isn't removed from cpuhp callback list, we can't reuse it, otherwise use-after-free may be triggered.
https://git.kernel.org/stable/c/ee18012c80155f6809522804099621070c69ec72
https://git.kernel.org/stable/c/b5792c162dcf6197bf3d2de2be6c8169435b73d0
https://git.kernel.org/stable/c/85672ca9ceeaa1dcf2777a7048af5f4aee3fd02b