by Kastro
Paper/Archive/CVE-2021-26379

CVE-2021-26379

AMD 2nd Gen AMD EPYC™ — Insufficient input validation of mailbox data in the SMU may allow an attacker to coerce the SMU to corrupt SMRAM, potentially leading to…

EPSS 0.7%CVSS 9.8
critical.is priorityof 100
40
CVSS 9.8 (ADP, NVD agree)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 52.5.525 × 2010.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Insufficient input validation of mailbox data in the SMU may allow an attacker to coerce the SMU to corrupt SMRAM, potentially leading to a loss of integrity and privilege escalation.

Affected

ProductAffectedFixed inSource
2nd Gen AMD EPYC™various –CNA
3rd Gen AMD EPYC™various –CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisoryamd.com/en/corporate/product-security/bulletin/AMD-SB-3001