Vulnerability identifier: #VU57350

Vulnerability risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2021-26318

CWE-ID: CWE-200

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
AMD CPU Firmware
Hardware solutions / Firmware

Vendor: AMD

Description

The vulnerability allows a local attacker to gain access to potentially sensitive information.

The vulnerability exists due to a timing and power-based side channel attack. A local attacker can leverage the x86 PREFETCH instructions and obtain kernel address space information.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

AMD CPU Firmware: All versions

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External links
http://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1017

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.