This update for bluez fixes the following issues: - CVE-2019-8921: Fixed heap-based buffer overflow via crafted request . - CVE-2019-8922: Fixed heap-based buffer overflow via crafted request . - CVE-2020-26558: Fixed vulnerability that may permit a nearby man-in-the-middle attacker to identify the Passkey . - CVE-2021-0129: Fixed improper access control . - CVE-2021-3658: Fixed adapter incorrectly restoring discoverable state after powered down . - CVE-2021-43400: Fixed use-after-free in gatt-database.c .