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Vulnerability record · CVE-2021-46744 · published 11 May 2022

CVE-2021-46744: Amd epyc 7001 firmware observable discrepancy vulnerability

AAmd · Epyc 7001 Firmware

An attacker with access to a malicious hypervisor may be able to infer data values used in a SEV guest on AMD CPUs by monitoring ciphertext values over time.

6.5 CVSS 3.1 Medium EPSS 0.33% · top 75.7% CWE-203 · Observable discrepancy
6.5CVSS 3.1 base score, v2 2.1
0.33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
99Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

An attacker with access to a malicious hypervisor may be able to infer data values used in a SEV guest on AMD CPUs by monitoring ciphertext values over time.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Affected products

99 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2022/08/08/6 Mailing ListThird Party Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1033 Vendor Advisory
http://www.openwall.com/lists/oss-security/2022/08/08/6 Mailing ListThird Party Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1033 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-20520Amd epyc 72f3 firmware out-of-bounds write vulnerabilityImproper access control settings in ASP Bootloader may allow an attacker to corrupt the return address causing a stack-based buffer overrun potential…EPSS 0.79%9.8CVE-2021-26379Amd epyc 72f3 firmware vulnerabilityInsufficient 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 i…EPSS 0.68%9.1CVE-2021-46756Amd epyc 72f3 firmware improper input validation vulnerabilityInsufficient validation of inputs in SVC_MAP_USER_STACK in the ASP (AMD Secure Processor) bootloader may allow an attacker with a malicious Uapp or A…EPSS 0.65%9.1CVE-2021-46762Amd epyc 72f3 firmware improper input validation vulnerabilityInsufficient input validation in the SMU may allow an attacker to corrupt SMU SRAM potentially leading to a loss of integrity or denial of service.EPSS 0.35%8.8CVE-2021-46769Amd epyc 72f3 firmware improper input validation vulnerabilityInsufficient syscall input validation in the ASP Bootloader may allow a privileged attacker to execute arbitrary DMA copies, which can lead to code e…EPSS 0.78%8.4CVE-2021-26340Amd epyc 7001 firmware vulnerabilityA malicious hypervisor in conjunction with an unprivileged attacker process inside an SEV/SEV-ES guest VM may fail to flush the Translation Lookaside…EPSS 0.24%8.2CVE-2021-26344Amd epyc 7203 firmware out-of-bounds write vulnerabilityAn out of bounds memory write when processing the AMD PSP1 Configuration Block (APCB) could allow an attacker with access the ability to modify the B…EPSS 0.16%7.8CVE-2021-26398Amd epyc 7h12 firmware out-of-bounds write vulnerabilityInsufficient input validation in SYS_KEY_DERIVE system call in a compromised user application or ABL may allow an attacker to corrupt ASP (AMD Secure…EPSS 0.21%

Source: NIST National Vulnerability Database (record CVE-2021-46744), CISA KEV, FIRST EPSS (scores of 2026-10-01). This page is refreshed as NVD updates the record.