Microsoft has admitted that this month’s Windows 10 Patch Tuesday updates are causing more problems, this time resulting in crashes due to a failure in the Local Security Authority Subsystem Service (LSASS) file, lsass.exe.
Committed new bug in KB articles for updates to Windows 10 version 1809 (KB4561608), version 1903 and version 1909 (KB4560960), and version 2004 (KB4557957).
Microsoft also notes that the June 16 out-of-band update, which patched printers that stopped working after installing Patch Tuesday updates, is affected by the LSASS flaw.
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“The Local Security Authority Subsystem Service (LSASS) file (lsass.exe) may fail on some devices with the error message, ‘A critical system process, C: WINDOWS system32 lsass.exe, failed with status code c0000008, the machine should now restart, “explains Microsoft.
Microsoft says it is working on a solution to be delivered in a future update. You haven’t confirmed if the LSASS issue affects earlier versions of Windows 10.
While the June updates appear to be the cause of the LSASS restarts, Bleeping Computer points to a user report in late May about machines running Windows 10 version 1809 upon seeing the error code outlined in known Microsoft issues.
“Event Viewer Log shows that LSASS.exe crashed on first boot with error c0000008 and then all services failed to authenticate afterwards, which likely caused the crash,” wrote the user.
It is unknown when the update will arrive, but Microsoft is rebooting its optional non-security update releases, week C and D releases in July, after pausing them in March to reduce the burden on IT managers during the coronavirus outbreak.
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Optional versions will only be available for Windows 10 and Windows Server, version 1809 and later. This gives administrators an opportunity to test the non-security fixes that will be included in the next month’s patch update or version B.
Microsoft is now calling out versions C and D, preliminary versions, to be delivered in the third week, also known as week C, of each month. IT professionals who use Windows Server Update Services (WSUS) to manage updates will no longer see Preview or C versions for Windows 10 or Windows Server in the WSUS channel.