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Versions Affected : All versions prior to TrueNAS 13.0-U2


When a CAM-managed device responds to a command with an error condition, CAM may automatically retry the command following some error recovery protocol.

For instance, it may send a SCSI START UNIT command to the device before retrying the failed command. In this case, an in-memory copy of the original command is preserved for a later retry. However, a specific portion of the command state was not saved correctly, and upon a retry this could lead to memory corruption. The bug can cause kernel panics or other system-level misbehaviour.


No workaround is available.


  • Upgrade to TrueNAS 13.0-U2 or later.


Further information