System boot fails due to Security Violation of shim caused by SbatLevel UEFI variable left from some other OS

Solution Verified - Updated -

Issue

System boot fails due to Security Violation of shim caused by SbatLevel UEFI variable left from some other OS.

When this issue occurs, shim displays the following screen:

A screenshot of shim indicating "Verification failed: (0x1A) Security Violation"

Environment

  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content