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

can: isotp: use unconditional synchronize_rcu() in isotp_release()

isotp_notify() unregisters the (RCU) CAN filters via can_rx_unregister()
and clears so->bound without waiting for a grace period. isotp_release()
uses so->bound to decide whether it needs to call synchronize_rcu()
before cancelling so->rxtimer, so when NETDEV_UNREGISTER runs first it
skips that synchronize_rcu() and can cancel the timer while an
in-flight isotp_rcv() is still executing and about to re-arm it via
isotp_send_fc(), leading to a use-after-free timer callback on the
freed socket.

sakisho-bot remarked a problem with rtnl_lock held in isotp_notify(),
therefore make isotp_release() always call synchronize_rcu() before
cancelling the timers, regardless of so->bound. This still closes the
original race (isotp_notify() clearing so->bound without waiting for
in-flight isotp_rcv() callers before isotp_release() cancels the RX
timer) without adding any RCU wait to the netdevice notifier path.

https://git.kernel.org/stable/c/15413a082df69175c2f96aeab4c26fe1ff7cff03

https://git.kernel.org/stable/c/59672aa4bcd8d32172c1ff6a179583981d6acabc

https://git.kernel.org/stable/c/6280eda96e0707264849fa7d036fed873c1f8a6d

https://git.kernel.org/stable/c/945d9894502cd9124f5d676181c542ed2000f7c0

https://git.kernel.org/stable/c/9b1a02e0d980ac6b0e36a90378f847062f81d7e4

https://git.kernel.org/stable/c/b8278ff605187ef3fa0f2705e93251cce4c4f8ee

https://git.kernel.org/stable/c/b88a511308779c225005d7994b8744561bdbafbc

https://git.kernel.org/stable/c/cb6abc584a1bfab107ac003d64948a4aef1730aa

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["net/can/isotp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"22bfa94db2ef6900c790884fa9461486516626e9","lessThan":"945d9894502cd9124f5d676181c542ed2000f7c0","versionType":"git","status":"affected"},{"version":"14a4696bc3118ba49da28f79280e1d55603aa737","lessThan":"59672aa4bcd8d32172c1ff6a179583981d6acabc","versionType":"git","status":"affected"},{"version":"14a4696bc3118ba49da28f79280e1d55603aa737","lessThan":"15413a082df69175c2f96aeab4c26fe1ff7cff03","versionType":"git","status":"affected"},{"version":"14a4696bc3118ba49da28f79280e1d55603aa737","lessThan":"6280eda96e0707264849fa7d036fed873c1f8a6d","versionType":"git","status":"affected"},{"version":"14a4696bc3118ba49da28f79280e1d55603aa737","lessThan":"cb6abc584a1bfab107ac003d64948a4aef1730aa","versionType":"git","status":"affected"},{"version":"14a4696bc3118ba49da28f79280e1d55603aa737","lessThan":"b88a511308779c225005d7994b8744561bdbafbc","versionType":"git","status":"affected"},{"version":"14a4696bc3118ba49da28f79280e1d55603aa737","lessThan":"b8278ff605187ef3fa0f2705e93251cce4c4f8ee","versionType":"git","status":"affected"},{"version":"14a4696bc3118ba49da28f79280e1d55603aa737","lessThan":"9b1a02e0d980ac6b0e36a90378f847062f81d7e4","versionType":"git","status":"affected"},{"version":"80c6ddf771df2ef786f28c1ca5919b3f1080091b","versionType":"git","status":"affected"},{"version":"ebf91625b3e404bd2b4b694c7ee71c1e8f8bd08f","versionType":"git","status":"affected"},{"version":"5.10.50","lessThan":"5.10.261","versionType":"semver","status":"affected"},{"version":"5.12.17","lessThan":"5.13","versionType":"semver","status":"affected"},{"version":"5.13.2","lessThan":"5.14","versionType":"semver","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["net/can/isotp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"5.14","status":"affected"},{"version":"0","lessThan":"5.14","versionType":"semver","status":"unaffected"},{"version":"5.10.261","lessThanOrEqual":"5.10.*","versionType":"semver","status":"unaffected"},{"version":"5.15.212","lessThanOrEqual":"5.15.*","versionType":"semver","status":"unaffected"},{"version":"6.1.178","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.97","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.40","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.5","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2-rc4","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]