CVE-2026-89719

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CVE-2026-89719
In the Linux kernel, the following vulnerability has been resolved:

zram: fix out-of-bounds access in read_block_state()

read_block_state() calculates nr_pages before taking dev_lock. If the
device is reset and reinitialized with a smaller disksize before lock
acquisition, nr_pages still describes the old table. The subsequent loop
can then call slot_lock() past the end of the newly allocated table.

Read disksize after acquiring dev_lock and checking that the device is
initialized. The read lock then keeps the table and its bound stable for
the duration of the scan.