BIOS更新きてた
http://www.dell.com/support/home/jp/ja/jpbsd1/drivers/driversdetails?driverId=NJDWW

2.6.0
Fixes
- Updated CPU microcode to address security advisory Intel Security Advisory INTEL-SA-00115 (CVE-2018-3639 & CVE-2018-3640).
- Updated Intel ME Firmware to address security advisory INTEL-SA-00118(CVE-2018-3627).
- Fixed the TPM configuration on a TPM startup error during S3 resume.