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Security researchers say Microsoft has been cautious with this Kerberos issue, promising a fix in a couple of weeks, but point out that the issue is likely buried in complex OS code.
The Kerberos authentication protocol is having issues, and a fix is weeks away.
The torrent of problematic updates for Windows shows no signs of drying up. Since Patch Tuesday this month, Microsoft has already confirmed a Direct Access connectivity issue in various versions of Windows (which it sort of fixed by rolling back the update), now the company has issued a warning that this month's updates are also causing problems with Kerberos authentication.
Microsoft has issued a notification about new known issues in Windows 10 and 11. Users might experience various bugs and instabilities after installing updates released earlier this month.
Microsoft is investigating a new known issue causing enterprise domain controllers to experience Kerberos sign-in failures and other authentication problems after installing cumulative updates released during this month's Patch Tuesday.