A bug exists where an attacker can read the kernel log through exposed Zircon kernel addresses without the required capability ZX_RSRC_KIND_ROOT. It is recommended to upgrade the Fuchsia kernel to 4.1.1 or greater.

MEDIUM May 03, 2022

CVE-2021-22556

The Security Team discovered an integer overflow bug that allows an attacker with code execution to issue memory cache invalidation operations on pages that they don’t own, allowing them to control kernel memory from userspace. We recommend upgrading to kernel version 4.1 or beyond.

MEDIUM May 03, 2022