Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2021-26318

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
13/10/2021
Last modified:
20/10/2021

Description

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.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 4.70 MEDIUM
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): None

Base Score 3.x
4.70
Severity 3.x
MEDIUM
Vector 2.0
AV:L/AC:M/Au:N/C:P/I:N/A:N CVSS v2.0 Severity and Metrics:

Base Score: 1.90 LOW
Vector: AV:L/AC:M/Au:N/C:P/I:N/A:N

Attack Vector (AV): Local
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): None
Availability (A): None

Base Score 2.0
1.90
Severity 2.0
LOW

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:amd:athlon_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:amd:athlon:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:athlon_pro_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:amd:athlon_pro:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:amd:epyc:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:amd:ryzen:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_pro_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:amd:ryzen_pro:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools