An issue was discovered in Insyde InsydeH2O Kernel 5.0 before 05.09.11, 5.1 before 05.17.11, 5.2 before 05.27.11, 5.3 before 05.36.11, 5.4 before 05.44.11, and 5.5 before 05.52.11 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.
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Affected Vendors & Products
References
History
Tue, 04 Nov 2025 20:30:00 +0000
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Status: PUBLISHED
Assigner: mitre
Published: 2022-02-03T01:30:36.000Z
Updated: 2025-11-04T19:12:32.043Z
Reserved: 2021-05-28T00:00:00.000Z
Link: CVE-2021-33627
No data.
Status : Modified
Published: 2022-02-03T02:15:06.983
Modified: 2025-11-04T20:16:00.530
Link: CVE-2021-33627
No data.