CVE-2026-98090

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

btrfs: restore active device pointers after failed sprout

btrfs init new device() switches latest dev and possibly s bdev from the seed device to the new sprout device before creating the first writable chunks.

If chunk creation or the subsequent sprout setup fails, the error path releases the new device without switching those pointers back. btrfs show devname() can then dereference the freed latest dev and crash.

Restore the active device pointers to the latest seed device before removing and releasing the failed sprout device.