AMD EPYC Processors contain an information disclosure vulnerability in the Secure Encrypted Virtualization with Encrypted State (SEV-ES) and Secure Encrypted Virtualization with Secure Nested Paging (SEV-SNP). A local authenticated attacker could potentially exploit this vulnerability leading to leaking guest data by the malicious hypervisor.
The affected products and corresponding update versions are shown in the table below.
| CVE | V3.1 Vector(Base) | Base Score | V3.1 Vector(Temporal Score) | Temporal Score |
| CVE-2020-12966 | AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H | 5.6 | E:P/RL:O/RC:C | 5.1 |
| Product | BIOS Update version |
| NF5468A5 | NF5468A5_BIOS_4.02.04_Standard_20210827 |
| NF5488A5 | NF5488A5_BIOS_4.02.06_Standard_20210827 |
KAYTUS provides method to update CPU Microcode of its various products as mentioned in the table above.Download your product’s corresponding BIOS image and perform the BIOS upgrade.
Please visit the Support Center site for updates on the applicable products.
2021-10-13 V1.0 INITIAL
For issues about implementing the recommendations of this Security Bulletin, contact normal KAYTUS Services Support channel. For other issues about the content of this Security Bulletin, send e-mail to sec@kaytus.com.
To report a potential security vulnerability for KAYTUS product: Reporting a Security Vulnerability
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