CVE-2021-43638: Amazon Workspaces

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Amazon Amazon WorkSpaces agent is affected by Integer Overflow. IOCTL Handler 0x22001B in the Amazon WorkSpaces agent below v1.0.1.1537 allow local attackers to execute arbitrary code in kernel mode or cause a denial of service (memory corruption and OS crash) via specially crafted I/O Request Packet.

Affected products

• Amazon Workspaces: before 1.0.1.1537 (fixed in 1.0.1.1537)

Published 2021-12-07. Last modified 2026-06-17.