CVE-2026-32216: Windows Redirected Drive Buffering System Denial of Service Vulnerability

Overview

Severity

Medium (CVSS 5.5)

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C

Category

Denial of Service

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Apr

Released

2026-04-14

Description

Null pointer dereference in Windows Redirected Drive Buffering allows an authorized attacker to deny service locally.

Affected Products (2)

Windows

• Windows 11 Version 26H1 for ARM64-based Systems
• Windows 11 version 26H1 for x64-based Systems

Security Updates (1)

• 5083768

Acknowledgments

<a href="https://bsky.app/profile/hexnomad.bsky.social">Erik Egsgard</a> with <a href="https://fieldeffect.com/">Field Effect</a>, Xinyu Yu with Tsinghua University, <a href="https://zhangshuqiao.org/">Shuqiao Zhang</a> with Tsinghua University, ziiiro

Revision History

• 2026-04-14: Information published.