An issue was discovered in Insyde InsydeH2O with kernel 5.1 through 2021-11-08 5.2 through 2021-11-08 and 5.3 through 2021-11-08. A StorageSecurityCommandDxe SMM memory corruption vulnerability allows an attacker to write fixed or predictable data to SMRAM. Exploiting this issue could lead to escalating privileges to SMM.