CVE-2022-23820
CWE-20Published: November 14, 2023· Updated: Jun 17, 2026
Official Description
Failure to validate the AMD SMM communication buffer
may allow an attacker to corrupt the SMRAM potentially leading to arbitrary
code execution.
Risk Analysis
A failure to validate the AMD SMM communication buffer allows an attacker to corrupt the SMRAM, potentially leading to arbitrary code execution. This is a critical firmware vulnerability that bypasses standard security protections. The high CVSS score indicates a severe risk to system integrity.
There is no public exploit known, and it is not in the CISA KEV. It is remotely exploitable with low complexity.
Apply the latest firmware updates from AMD for the affected processor models. Maintain secure boot practices to protect the integrity of the firmware environment.
Technical Analysis
CVE-2022-23820 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (6)
Quick Facts
Related CVEs (CWE-20)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2022-23820 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts