Specifies whether SharedArrayBuffers can be used in a non cross-origin-isolated context

Policy ID: SharedArrayBufferUnrestrictedAccessAllowed
Scope: Computer Configuration, User Configuration
Supported on: Microsoft Edge version 92, Windows 7 or later
Source: Microsoft Edge Policy Templates (version 155.0.4283.45)
Category: Microsoft Edge

Description

Specifies whether SharedArrayBuffers can be used in a non-cross-origin-isolated context. A SharedArrayBuffer is a binary data buffer that's used to create views on shared memory. SharedArrayBuffers have a memory access vulnerability in several popular CPUs.

If you enable this policy, sites are allowed to use SharedArrayBuffers with no restrictions.

If you disable or don't configure this policy, sites are allowed to use SharedArrayBuffers only when cross-origin isolated.

Microsoft Edge requires cross-origin isolation when using SharedArrayBuffers from Microsoft Edge version 91 onward for Web Compatibility reasons.

Registry

ComputerHKEY_LOCAL_MACHINE

HKLM\Software\Policies\Microsoft\Edge View registry values

SharedArrayBufferUnrestrictedAccessAllowedREG_DWORD

UserHKEY_CURRENT_USER

HKCU\Software\Policies\Microsoft\Edge View registry values

SharedArrayBufferUnrestrictedAccessAllowedREG_DWORD

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