I can confirm this:

6.2.0-1015 Kernel
~# uname -a
Linux pi-geosvrd01 6.2.0-1015-azure #15~22.04.1-Ubuntu SMP Fri Oct  6 13:20:44 
UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

~# lsmod | grep cifs
cifs                 1363968  2
cifs_arc4              16384  1 cifs
cifs_md4               16384  1 cifs
fscache               380928  1 cifs

~# ls -lh /lib/modules/6.2.0-1015-azure/kernel/fs/cifs
-rw-r--r-- 1 root root 2.8M Oct  6 07:20 cifs.ko

~# ls -lh /lib/modules/6.2.0-1015-azure/kernel/fs
total 128K
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 9p
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 autofs
-rw-r--r-- 1 root root  38K Oct  6 07:20 binfmt_misc.ko
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 btrfs
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 cachefiles
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 ceph
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 cifs
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 dlm
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 fat
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 fscache
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 fuse
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 isofs
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 lockd
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 netfs
drwxr-xr-x 5 root root 4.0K Oct 31 09:00 nfs
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 nfs_common
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 nfsd
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 nls
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 overlayfs
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 smbfs_common
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 udf
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 ufs
drwxr-xr-x 2 root root 4.0K Oct 31 09:00 xfs


After installing the 6.2.0-1016 kernel and rebooting unable to mount CIFS 
filesystems:
~# uname -a
Linux pi-geosvrd01 6.2.0-1016-azure #16~22.04.1-Ubuntu SMP Tue Oct 10 17:11:51 
UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

~# modprobe cifs
modprobe: FATAL: Module cifs not found in directory 
/lib/modules/6.2.0-1016-azure

~#
mount error: cifs filesystem not supported by the system
mount error(19): No such device

~# ls -lh /lib/modules/6.2.0-1016-azure/kernel/fs/
total 120K
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 9p
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 autofs
-rw-r--r-- 1 root root  38K Oct 10 11:03 binfmt_misc.ko
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 btrfs
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 cachefiles
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 ceph
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 dlm
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 fat
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 fscache
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 fuse
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 isofs
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 lockd
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 netfs
drwxr-xr-x 5 root root 4.0K Oct 31 09:36 nfs
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 nfs_common
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 nfsd
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 nls
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 overlayfs
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 udf
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 ufs
drwxr-xr-x 2 root root 4.0K Oct 31 09:36 xfs

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-azure in Ubuntu.
https://bugs.launchpad.net/bugs/2042092

Title:
  CIFS module is not included in 6.2.0-1016

Status in linux-azure package in Ubuntu:
  Confirmed

Bug description:
  Between 6.2.0-1015 and 6.2.0-1016, the CIFS module was moved from
  fs/cifs/* to fs/smb/client/*, fs/smb/common/* and fs/smb/server/*. The
  inclusion list (root/debian.azure-6.2/control.d/azure.inclusion-list)
  was not updated for this change, so the module is not included in the
  linux-modules-6.2.0-1026-azure package.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/2042092/+subscriptions


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