CVE-2021-22556: Google Fuchsia

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Google Fuchsia: before 4.1 (fixed in 4.1)

Published 2022-05-03. Last modified 2026-06-17.