CVE-2026-32603 HIGH

CVE-2026-32603: Sandboxie kernel driver denial of service via malformed IOCTL from sandboxed process

Vendor Sandboxie-Plus
Product Sandboxie
Weakness CWE-20 · Input validation
Published May 5, 2026
Last update May 6, 2026

CVSS base score

8.2/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

What the vulnerability does

01Description

Sandboxie is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, a local denial of service vulnerability exists in the Sandboxie kernel driver. An unprivileged process running inside a Standard Sandbox can send a malformed IOCTL to the \Device\SandboxieDriverApi driver, triggering an immediate kernel crash (BSOD). The vulnerability affects the Standard Sandbox configuration both with and without dropped administrator privileges, but does not affect the Security Hardened Sandbox configuration. This issue has been fixed in version 1.17.3. Users who cannot update can use the Security Hardened Sandbox configuration as a workaround.

Key dates

02Disclosure timeline

May 5, 2026 CVE published
May 6, 2026 Record updated