CVE-2021-33627

2022-02-0301:30:36

mitre

www.cve.org

8.4 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

20.6%

JSON

An issue was discovered in Insyde InsydeH2O 5.x, affecting FwBlockServiceSmm. Software SMI services that use the Communicate() function of the EFI_SMM_COMMUNICATION_PROTOCOL do not check whether the address of the buffer is valid, which allows use of SMRAM, MMIO, or OS kernel addresses