In the Linux kernel, the following vulnerability has been resolved: drivers/base/memory: fix memory block reference leak in poison accounting memblk_nr_poison_inc() and memblk_nr_poison_sub() look up a memory block via find_memory_block_by_id(), which acquires a reference to the memory block device. Both helpers use the returned memory block without dropping that reference, leaking the device reference on each successful lookup. Drop the reference after updating nr_hwpoison.
https://git.kernel.org/stable/c/ce60d9452a0f2effa72fd20ea270c59ca691d455
https://git.kernel.org/stable/c/8502e2c2d0633f99d94d22ae8dabc10caae1fc2a
https://git.kernel.org/stable/c/686b4283f82cd630fafd7ca9b03dfc080b3ec8fa
https://git.kernel.org/stable/c/24840b3139d7415144b81e4f9f4c44670d15bed9
https://git.kernel.org/stable/c/03a2cc1756a0570f887d624cd6c535ea0cbd4951