CVE-2021-26318

A timing and power-based side channel attack leveraging the x86 PREFETCH instructions on some AMD CPUs could potentially result in leaked kernel address space information.

CVSS v3 4.7 MEDIUM
CVSS v2.0 1.9 LOW

4.7^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.0 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

1.9^/10

CVSS v2.0 : LOW

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

Exploitability : 3.4 / Impact : 2.9

Access Vector LOCAL

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1017	Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1017	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:amd:athlon_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:amd:athlon:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:amd:athlon_pro_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:amd:athlon_pro:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:o:amd:epyc_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:amd:epyc:-:*:*:*:*:*:*:*

Configuration 4 (hide)

AND

cpe:2.3:o:amd:ryzen_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:amd:ryzen:-:*:*:*:*:*:*:*

Configuration 5 (hide)

AND

cpe:2.3:o:amd:ryzen_pro_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:amd:ryzen_pro:-:*:*:*:*:*:*:*

History

21 Nov 2024, 05:56

Type	Values Removed	Values Added
References	~~() https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1017 - Vendor Advisory~~	() https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1017 - Vendor Advisory

Information

Published : 2021-10-13 19:15

Updated : 2024-11-21 05:56

NVD link : CVE-2021-26318

Mitre link : CVE-2021-26318

CVE.ORG link : CVE-2021-26318

JSON object : View

Products Affected

amd

epyc
athlon_pro
epyc_firmware
athlon
ryzen_pro_firmware
athlon_firmware
ryzen_pro
ryzen
athlon_pro_firmware
ryzen_firmware

CWE

CWE-208

Observable Timing Discrepancy

CWE-203

Observable Discrepancy

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