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Vulnerability Details :

CVE-2021-26340

Summary
Assigner-AMD
Assigner Org ID-b58fc414-a1e4-4f92-9d70-1add41838648
Published At-10 Dec, 2021 | 21:55
Updated At-16 Sep, 2024 | 16:29
Rejected At-
Credits

A malicious hypervisor in conjunction with an unprivileged attacker process inside an SEV/SEV-ES guest VM may fail to flush the Translation Lookaside Buffer (TLB) resulting in unexpected behavior inside the virtual machine (VM).

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:AMD
Assigner Org ID:b58fc414-a1e4-4f92-9d70-1add41838648
Published At:10 Dec, 2021 | 21:55
Updated At:16 Sep, 2024 | 16:29
Rejected At:
▼CVE Numbering Authority (CNA)

A malicious hypervisor in conjunction with an unprivileged attacker process inside an SEV/SEV-ES guest VM may fail to flush the Translation Lookaside Buffer (TLB) resulting in unexpected behavior inside the virtual machine (VM).

Affected Products
Vendor
Advanced Micro Devices, Inc.AMD
Product
AMD EPYC™
Versions
Affected
  • From Processor through 3rd gen EPYC (custom)
Problem Types
TypeCWE IDDescription
textN/ANA
Type: text
CWE ID: N/A
Description: NA
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1023
x_refsource_MISC
Hyperlink: https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1023
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1023
x_refsource_MISC
x_transferred
Hyperlink: https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1023
Resource:
x_refsource_MISC
x_transferred
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:psirt@amd.com
Published At:10 Dec, 2021 | 22:15
Updated At:15 Dec, 2021 | 19:43

A malicious hypervisor in conjunction with an unprivileged attacker process inside an SEV/SEV-ES guest VM may fail to flush the Translation Lookaside Buffer (TLB) resulting in unexpected behavior inside the virtual machine (VM).

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.18.4HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Primary2.03.6LOW
AV:L/AC:L/Au:N/C:P/I:P/A:N
Type: Primary
Version: 3.1
Base score: 8.4
Base severity: HIGH
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Type: Primary
Version: 2.0
Base score: 3.6
Base severity: LOW
Vector:
AV:L/AC:L/Au:N/C:P/I:P/A:N
CPE Matches

Advanced Micro Devices, Inc.
amd
>>epyc_7001_firmware>>-
cpe:2.3:o:amd:epyc_7001_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7001>>-
cpe:2.3:h:amd:epyc_7001:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7232p_firmware>>-
cpe:2.3:o:amd:epyc_7232p_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7232p>>-
cpe:2.3:h:amd:epyc_7232p:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7251_firmware>>-
cpe:2.3:o:amd:epyc_7251_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7251>>-
cpe:2.3:h:amd:epyc_7251:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7261_firmware>>-
cpe:2.3:o:amd:epyc_7261_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7261>>-
cpe:2.3:h:amd:epyc_7261:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7252_firmware>>-
cpe:2.3:o:amd:epyc_7252_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7252>>-
cpe:2.3:h:amd:epyc_7252:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_74f3_firmware>>-
cpe:2.3:o:amd:epyc_74f3_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_74f3>>-
cpe:2.3:h:amd:epyc_74f3:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7501_firmware>>-
cpe:2.3:o:amd:epyc_7501_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7501>>-
cpe:2.3:h:amd:epyc_7501:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7502_firmware>>-
cpe:2.3:o:amd:epyc_7502_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7502>>-
cpe:2.3:h:amd:epyc_7502:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7502p_firmware>>-
cpe:2.3:o:amd:epyc_7502p_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7502p>>-
cpe:2.3:h:amd:epyc_7502p:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7513_firmware>>-
cpe:2.3:o:amd:epyc_7513_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7513>>-
cpe:2.3:h:amd:epyc_7513:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7532_firmware>>-
cpe:2.3:o:amd:epyc_7532_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7532>>-
cpe:2.3:h:amd:epyc_7532:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7542_firmware>>-
cpe:2.3:o:amd:epyc_7542_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7542>>-
cpe:2.3:h:amd:epyc_7542:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7543_firmware>>-
cpe:2.3:o:amd:epyc_7543_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7543>>-
cpe:2.3:h:amd:epyc_7543:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7543p_firmware>>-
cpe:2.3:o:amd:epyc_7543p_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7543p>>-
cpe:2.3:h:amd:epyc_7543p:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7551_firmware>>-
cpe:2.3:o:amd:epyc_7551_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7551>>-
cpe:2.3:h:amd:epyc_7551:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7551p_firmware>>-
cpe:2.3:o:amd:epyc_7551p_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7551p>>-
cpe:2.3:h:amd:epyc_7551p:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7552_firmware>>-
cpe:2.3:o:amd:epyc_7552_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7552>>-
cpe:2.3:h:amd:epyc_7552:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_75f3_firmware>>-
cpe:2.3:o:amd:epyc_75f3_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_75f3>>-
cpe:2.3:h:amd:epyc_75f3:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7601_firmware>>-
cpe:2.3:o:amd:epyc_7601_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7601>>-
cpe:2.3:h:amd:epyc_7601:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7642_firmware>>-
cpe:2.3:o:amd:epyc_7642_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7642>>-
cpe:2.3:h:amd:epyc_7642:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7643_firmware>>-
cpe:2.3:o:amd:epyc_7643_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7643>>-
cpe:2.3:h:amd:epyc_7643:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7662_firmware>>-
cpe:2.3:o:amd:epyc_7662_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7662>>-
cpe:2.3:h:amd:epyc_7662:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7663_firmware>>-
cpe:2.3:o:amd:epyc_7663_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7663>>-
cpe:2.3:h:amd:epyc_7663:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7702p_firmware>>-
cpe:2.3:o:amd:epyc_7702p_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7702p>>-
cpe:2.3:h:amd:epyc_7702p:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7702_firmware>>-
cpe:2.3:o:amd:epyc_7702_firmware:-:*:*:*:*:*:*:*
Advanced Micro Devices, Inc.
amd
>>epyc_7702>>-
cpe:2.3:h:amd:epyc_7702:-:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
NVD-CWE-noinfoPrimarynvd@nist.gov
CWE ID: NVD-CWE-noinfo
Type: Primary
Source: nvd@nist.gov
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1023psirt@amd.com
Vendor Advisory
Hyperlink: https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1023
Source: psirt@amd.com
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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Matching Score-8
Assigner-Advanced Micro Devices Inc.
ShareView Details
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Assigner-Advanced Micro Devices Inc.
CVSS Score-7.1||HIGH
EPSS-0.13% / 33.11%
||
7 Day CHG-0.01%
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Updated-17 Sep, 2024 | 01:51
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Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
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CVE-2021-26363
Matching Score-8
Assigner-Advanced Micro Devices Inc.
ShareView Details
Matching Score-8
Assigner-Advanced Micro Devices Inc.
CVSS Score-4.4||MEDIUM
EPSS-0.12% / 31.41%
||
7 Day CHG-0.01%
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