Permission denied error (mount error 13) when trying to mount CIFS share after updating to kernel-2.6.18-371 or Red Hat Enterprise Linux 5.10

Issue

• Attempting to mount CIFS share results in error "mount error 13 = Permission denied"
• Only one user's share can be mounted successfully.
• For example:

# mount.cifs //exampleserver/mirai /kyoukai/mirai -o credentials=/root/.credentials/one
# mount.cifs //exampleserver/mitsu /kyoukai/mitsu -o credentials=/root/.credentials/two
mount error 13 = Permission denied
Refer to the mount.cifs(8) manual page (e.g.man mount.cifs)

• When trying to manually mount them from command line, the following error appears in dmesg or /var/log/messages:

Status code returned 0xc000006a NT_STATUS_WRONG_PASSWORD
 CIFS VFS: Send error in SessSetup = -13
 CIFS VFS: cifs_mount failed w/return code = -13