CVE-2021-26339

moderate-risk
Published 2022-05-11

A bug in AMD CPU’s core logic may allow for an attacker, using specific code from an unprivileged VM, to trigger a CPU core hang resulting in a potential denial of service. AMD believes the specific code includes a specific x86 instruction sequence that would not be generated by compilers.

Do I need to act?

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0.09% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (20)

Affected Vendors

Amd

References (4)

Vendor Advisory https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027
Vendor Advisory https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028
Vendor Advisory https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027
Vendor Advisory https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028
47
/ 100
moderate-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 29/34 · Critical