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.
https://www.insyde.com/security-pledge
https://security.netapp.com/advisory/ntap-20220216-0003/
https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf