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 v3.0 4.7 MEDIUM
CVSS v2.0 1.9 LOW

4.7^/10

CVSS v3.0 : 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

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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:-:*:*:*:*:*:*:*

Information

Published : 2021-10-13 12:15

Updated : 2021-10-20 11:29

NVD link : CVE-2021-26318

Mitre link : CVE-2021-26318

JSON object : View

CWE

CWE-203

Observable Discrepancy

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Products Affected

amd

ryzen
ryzen_pro_firmware
athlon
athlon_pro_firmware
epyc
ryzen_pro
athlon_pro
athlon_firmware
ryzen_firmware
epyc_firmware

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