Key Information Summary Vulnerability Type: NULL pointer dereference Affected File: Problem Function: Issue Description: When determining GFX12 PTE flags, the backend storage of the BO (Buffer Object) is not checked for NULL. If the BO lacks backend storage, will be NULL, leading to a crash upon direct dereference. Fix: Added a NULL check before accessing to ensure it is not NULL before proceeding with dereference. Related Commit: This fix is based on the previous commit , which was used to check the correct memory type to determine the variable. Review and Sign-off: Reviewed by Christian König, Natalie Vock, and Alex Deucher; signed off by Greg Kroah-Hartman.