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

scsi: ufs: core: Remove SCSI host only if added

If host tries to remove ufshcd driver from a UFS device it would cause a
kernel panic if ufshcd_async_scan fails during ufshcd_probe_hba before
adding a SCSI host with scsi_add_host and MCQ is enabled since SCSI host
has been defered after MCQ configuration introduced by commit 0cab4023ec7b
("scsi: ufs: core: Defer adding host to SCSI if MCQ is supported").

To guarantee that SCSI host is removed only if it has been added, set the
scsi_host_added flag to true after adding a SCSI host and check whether it
is set or not before removing it.

kernel.org https://git.kernel.org/stable/c/2f49e05d6b58d660f035a75ff96b77071b4bd5ed [No types assigned]

kernel.org https://git.kernel.org/stable/c/3844586e9bd9845140e1078f1e61896b576ac536 [No types assigned]

kernel.org https://git.kernel.org/stable/c/7cbff570dbe8907e23bba06f6414899a0fbb2fcc [No types assigned]