https://bugzilla.samba.org/show_bug.cgi?id=15428 Bug ID: 15428 Summary: Linux mount.smb3 Fails With Windows Host After Update July 2023 Update kb5028166 Product: CifsVFS Version: 4.x Hardware: All OS: Linux Status: NEW Severity: major Priority: P5 Component: user space tools Assignee: jlayton@xxxxxxxxx Reporter: sbharvey@xxxxxxxxxxx QA Contact: cifs-qa@xxxxxxxxx Target Milestone: --- Created attachment 17993 --> https://bugzilla.samba.org/attachment.cgi?id=17993&action=edit Successful mount.smb3 prior to windows update Prior to July 2023 windows host "shares" could be mounted in Linux Servers with the command mount.smb3. After Windows security update kb5028166 the mount command no longer functions. I believe this is related bug 15418 "Secure Channel Faulty ..." Attachments are added that show that a Windows 10 host "share" can be mounted successfully and when the share cannot be added after the Window 10/11 security update kb5028166 has been applied. Here is the dmesg message when the mount.smb3 command fails: cat dmesg_mnt_failure.txt [507009.217361] CIFS: Attempting to mount //win10-testhost.harvey.net/public [509040.494271] CIFS: Attempting to mount //win10-testhost.harvey.net/public [509040.665517] CIFS: Status code returned 0xc000018d STATUS_TRUSTED_RELATIONSHIP_FAILURE Linux Version and distribution: swupd info Distribution: Clear Linux OS Installed version: 39630 Version URL: https://cdn.download.clearlinux.org/update Content URL: https://cdn.download.clearlinux.org/update uname -a Linux netserver03 6.4.3-1333.native #1 SMP Mon Jul 10 21:56:56 PDT 2023 x86_64 GNU/Linux samba --version Version 4.18.1 -- You are receiving this mail because: You are the QA Contact for the bug.