Vulnerability identifier: #VU63745

Vulnerability risk: Low

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

CVE-ID: CVE-2021-26384

CWE-ID: CWE-787

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
AMD Ryzen 2000 series Desktop processor
Hardware solutions / Firmware
AMD Ryzen 5000 Series Desktop processor with Radeon graphics
Hardware solutions / Firmware
AMD Ryzen 2000 Series Mobile processor
Hardware solutions / Firmware
AMD Ryzen 3000 Series Mobile processor
Hardware solutions / Firmware
2nd Gen AMD Ryzen Mobile processor with Radeon graphics
Hardware solutions / Firmware
AMD Athlon 3000 Series Mobile processors with Radeon Graphics
Hardware solutions / Firmware
AMD Ryzen 5000 Series Mobile processor with Radeon graphics
Hardware solutions / Firmware

Vendor: AMD

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in System Management Interface. A local user can run a specially crafted SMI command to establish a corrupted SMI Trigger Info data structure and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

AMD Ryzen 2000 series Desktop processor: All versions

AMD Ryzen 5000 Series Desktop processor with Radeon graphics: All versions

AMD Ryzen 2000 Series Mobile processor: All versions

AMD Ryzen 3000 Series Mobile processor: All versions

2nd Gen AMD Ryzen Mobile processor with Radeon graphics: All versions

AMD Athlon 3000 Series Mobile processors with Radeon Graphics: All versions

AMD Ryzen 5000 Series Mobile processor with Radeon graphics: All versions

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External links
http://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027

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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.