NVD

CVE-2021-26342 Detail

Modified

This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.

Description

In SEV guest VMs, the CPU may fail to flush the Translation Lookaside Buffer (TLB) following a particular sequence of operations that includes creation of a new virtual machine control block (VMCB). The failure to flush the TLB may cause the microcode to use stale TLB translations which may allow for disclosure of SEV guest memory contents. Users of SEV-ES/SEV-SNP guest VMs are not impacted by this vulnerability.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 3.3 LOW

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: 2.1 LOW

Vector: (AV:L/AC:L/Au:N/C:P/I:N/A:N)

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028	Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-noinfo	Insufficient Information	NIST

Known Affected Software Configurations Switch to CPE 2.2

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Change History

3 change records found show changes

Initial Analysis by NIST 5/19/2022 4:05:04 PM

Action	Type	Old Value	New Value
Added	CVSS V3.1		NIST AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Added	CVSS V2		NIST (AV:L/AC:L/Au:N/C:P/I:N/A:N)
Added	CWE		NIST NVD-CWE-noinfo
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7001_firmware::::::::* versions up to (excluding) naplespi-sp3_1.0.0.h OR cpe:2.3:h:amd:epyc_7001:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7251_firmware::::::::* versions up to (excluding) naplespi-sp3_1.0.0.h OR cpe:2.3:h:amd:epyc_7251:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7261_firmware::::::::* versions up to (excluding) naplespi-sp3_1.0.0.h OR cpe:2.3:h:amd:epyc_7261:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7281_firmware::::::::* versions up to (excluding) naplespi-sp3_1.0.0.h OR cpe:2.3:h:amd:epyc_7281:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_72f3_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_72f3:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7301_firmware::::::::* versions up to (excluding) naplespi-sp3_1.0.0.h OR cpe:2.3:h:amd:epyc_7301:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7313_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7313:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7313p_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7313p:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7343_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7343:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7351_firmware::::::::* versions up to (excluding) naplespi-sp3_1.0.0.h OR cpe:2.3:h:amd:epyc_7351:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7351p_firmware::::::::* versions up to (excluding) naplespi-sp3_1.0.0.h OR cpe:2.3:h:amd:epyc_7351p:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7371_firmware::::::::* versions up to (excluding) naplespi-sp3_1.0.0.h OR cpe:2.3:h:amd:epyc_7371:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7373x_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7373x:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_73f3_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_73f3:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7401_firmware::::::::* versions up to (excluding) naplespi-sp3_1.0.0.h OR cpe:2.3:h:amd:epyc_7401:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7401p_firmware::::::::* versions up to (excluding) naplespi-sp3_1.0.0.h OR cpe:2.3:h:amd:epyc_7401p:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7413_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7413:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7443_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7443:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7443p_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7443p:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7451_firmware::::::::* versions up to (excluding) naplespi-sp3_1.0.0.h OR cpe:2.3:h:amd:epyc_7451:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7453_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7453:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7473x_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7473x:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_74f3_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_74f3:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7501_firmware::::::::* versions up to (excluding) naplespi-sp3_1.0.0.h OR cpe:2.3:h:amd:epyc_7501:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7513_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7513:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7543_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7543:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7543p_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7543p:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7551_firmware::::::::* versions up to (excluding) naplespi-sp3_1.0.0.h OR cpe:2.3:h:amd:epyc_7551:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7551p_firmware::::::::* versions up to (excluding) naplespi-sp3_1.0.0.h OR cpe:2.3:h:amd:epyc_7551p:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7573x_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7573x:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_75f3_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_75f3:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7601_firmware::::::::* versions up to (excluding) naplespi-sp3_1.0.0.h OR cpe:2.3:h:amd:epyc_7601:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7643_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7643:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7663_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7663:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7713_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7713:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7713p_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7713p:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7763_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7763:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:amd:epyc_7773x_firmware::::::::* versions up to (excluding) milanpi-sp3_1.0.0.7 OR cpe:2.3:h:amd:epyc_7773x:-:::::::*
Changed	Reference Type	https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028 No Types Assigned	https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028 Vendor Advisory

Quick Info

CVE Dictionary Entry:
CVE-2021-26342
NVD Published Date:
05/11/2022
NVD Last Modified:
11/21/2024
Source:
Advanced Micro Devices Inc.

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2021-26342 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by CVE 11/21/2024 12:56:09 AM

CVE Modified by Advanced Micro Devices Inc. 5/14/2024 4:35:54 AM

Initial Analysis by NIST 5/19/2022 4:05:04 PM

Quick Info