CVE-2021-26328 : Failure to verify the mode of CPU execution at the time of SNP

Failure to verify the mode of CPU execution at the time of SNP_INIT may lead to a potential loss of memory integrity for SNP guests.

Published 2023-01-11 08:15:10

Updated 2025-04-09 15:15:43

Source Advanced Micro Devices Inc.

View at NVD, CVE.org

Products affected by CVE-2021-26328

AMD » Epyc 7763 Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7763_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7763 » Version: N/A
AMD » Epyc 7713p Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7713p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7713p » Version: N/A
AMD » Epyc 7713 Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7713_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7713 » Version: N/A
AMD » Epyc 7663 Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7663_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7663 » Version: N/A
AMD » Epyc 7643 Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7643_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7643 » Version: N/A
AMD » Epyc 75f3 Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_75f3_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 75f3 » Version: N/A
AMD » Epyc 7543p Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7543p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7543p » Version: N/A
AMD » Epyc 7543 Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7543_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7543 » Version: N/A
AMD » Epyc 7513 Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7513_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7513 » Version: N/A
AMD » Epyc 7453 Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7453_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7453 » Version: N/A
AMD » Epyc 74f3 Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_74f3_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 74f3 » Version: N/A
AMD » Epyc 7443p Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7443p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7443p » Version: N/A
AMD » Epyc 7443 Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7443_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7443 » Version: N/A
AMD » Epyc 7413 Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7413_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7413 » Version: N/A
AMD » Epyc 73f3 Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_73f3_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 73f3 » Version: N/A
AMD » Epyc 7343 Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7343_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7343 » Version: N/A
AMD » Epyc 7313p Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7313p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7313p » Version: N/A
AMD » Epyc 7313 Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7313_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7313 » Version: N/A
AMD » Epyc 72f3 Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_72f3_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 72f3 » Version: N/A
AMD » Epyc 7003 Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7003_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7003 » Version: N/A
AMD » Epyc 7773x Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7773x_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7773x » Version: N/A
AMD » Epyc 7573x Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7573x_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7573x » Version: N/A
AMD » Epyc 7373x Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7373x_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7373x » Version: N/A
AMD » Epyc 7743 Firmware
Versions before (<) milanpi_1.0.0.8
cpe:2.3:o:amd:epyc_7743_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7743 » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2021-26328

EPSS FAQ

0.05%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 12 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-26328

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source	First Seen
4.4	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L	1.8	2.5	134c704f-9b21-4f2e-91b3-4a467353bcc0	2025-04-09
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: Low Availability: Low
4.4	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L	1.8	2.5	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: Low Availability: Low

CWE ids for CVE-2021-26328

CWE-358 Improperly Implemented Security Check for Standard

The product does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique.

Assigned by: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

References for CVE-2021-26328

https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032

Access Denied
Vendor Advisory

CVEs referencing this url

Jump to

Vulnerability Details : CVE-2021-26328

Products affected by CVE-2021-26328

Exploit prediction scoring system (EPSS) score for CVE-2021-26328

CVSS scores for CVE-2021-26328

CWE ids for CVE-2021-26328

References for CVE-2021-26328