Signing kernel driver fails with Cab Signature validation failed with error: 0x80090008
As of 14.09.2021 I am getting error when submitting drivers for signing. When I submit the CAB file, I get Cab Signature validation failed with error: 0x80090008. What causes the issue is a simple parameter of signtool.exe when I sign the CAB file. Obviously, Microsoft have changed the requirements for what type of CAB signing they accept. Till yesterday, my signtool.exe options were "/a /tr http://timestapprovider/ /td sha256 .. etc" After I got the error I started reading I found out I'm missing one more parameter : "/fd sha256" So, it should be like : "/a /fd sha256 /tr http://timestampprovider/ /td sha256 ... etc" To be honest I don't know how I have missed the change, but now it works. Hope this helps. Cheers, Daniel