After updating to RHEL8.1 EIO errors with cifs signing "CIFS VFS: SMB signature verification returned error = -5"

Solution Verified - Updated -


  • The following errors appear in the system log many times when running RHEL8.1 (4.18.0-147.el8) kernel indicating EIO (-5) error with SMB signature verification
CIFS VFS: SMB signature verification returned error = -5


  • Red Hat Enterprise Linux 8.1
  • cifs with signing enabled
  • same file being read by multiple processes at the same time

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