In the Linux kernel, the following vulnerability has been resolved:
mtd: ubi: Release device reference on busy detach
ubi_detach_mtd_dev() obtains a device reference through ubi_get_device()
before checking whether the UBI device is busy. The busy return path drops
ubi->ref_count but leaves the device reference held, so the device object
cannot be released after a later detach.
Drop the device reference before returning -EBUSY.
References 4
https://git.kernel.org/stable/c/31dd710cd84d5dd63c49f640d3a9f36c9699ca95
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/851c5e9a829d56cb0982965f07ef8966a6722884
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/87812858c4c8df979cb70bcd0040b925a543df6f
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/e065960366b55ab21e6c643c30dec2a41451900b
416baaa9-dc9f-4396-8d5f-8c081fb06d67