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MEDIUM · 4.7

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.

Vulnerability 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.

CVSS Score

4.7

MEDIUM

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE

Affected Products

VendorProductVersions
AmdAthlon Firmware-
AmdAthlon-
AmdAthlon Pro Firmware-
AmdAthlon Pro-
AmdEpyc Firmware-
AmdEpyc-
AmdRyzen Firmware-
AmdRyzen-
AmdRyzen Pro Firmware-
AmdRyzen Pro-

Related Weaknesses (CWE)

CWE-208CWE-203

References

FAQ

What is CVE-2021-26318?

CVE-2021-26318 is a vulnerability with a CVSS score of 4.7 (MEDIUM). 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.

How severe is CVE-2021-26318?

CVE-2021-26318 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-26318?

Check the references section above for vendor advisories and patch information. Affected products include: Amd Athlon Firmware, Amd Athlon, Amd Athlon Pro Firmware, Amd Athlon Pro, Amd Epyc Firmware.