VulnerabilityModified
CVE-2021-26339
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.
MEDIUM 5.5EPSS 0.27%
Does this matter?
Lower severity and a low EPSS score (0.27%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.27% probability · 20th percentile
- CISA KEV
- Not listed
- Affected
- amd/epyc 7763 firmware · amd/epyc 7713p firmware · amd/epyc 7713 firmware · amd/epyc 7663 firmware · amd/epyc 7643 firmware · amd/epyc 75f3 firmware · amd/epyc 7543p firmware · amd/epyc 7543 firmware · amd/epyc 7513 firmware · amd/epyc 7453 firmware · amd/epyc 74f3 firmware · amd/epyc 7443p firmware · amd/epyc 7443 firmware · amd/epyc 7413 firmware · amd/epyc 73f3 firmware · amd/epyc 7343 firmware · amd/epyc 7313p firmware · amd/epyc 7313 firmware · amd/epyc 72f3 firmware · amd/epyc 7773x firmware · +40 more
- Source
- psirt@amd.com
References
- https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027Vendor Advisory
- https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028Vendor Advisory
- https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027Vendor Advisory
- https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.