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Vulnerability record · CVE-2021-26341 · published 11 March 2022

CVE-2021-26341: Amd athlon x4 940 firmware vulnerability

AAmd · Athlon X4 940 Firmware

Some AMD CPUs may transiently execute beyond unconditional direct branches, which may potentially result in data leakage.

6.5 CVSS 3.1 Medium EPSS 0.32% · top 77.3% CWE-212 · CWE-212
6.5CVSS 3.1 base score, v2 2.1
0.32%EPSS exploitation probability, 30 days
NoNot in CISA KEV
126Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Some AMD CPUs may transiently execute beyond unconditional direct branches, which may potentially result in data leakage.

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

Affected products

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

References

LinkTags
http://www.openwall.com/lists/oss-security/2022/03/18/2 Mailing ListThird Party Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1026 Vendor Advisory
http://www.openwall.com/lists/oss-security/2022/03/18/2 Mailing ListThird Party Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1026 Vendor Advisory

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Related vulnerabilities

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

6.5CVE-2022-23825Debian linux exposure of resource to wrong sphere vulnerabilityAliases in the branch predictor may cause some AMD processors to predict the wrong branch type potentially leading to information disclosure.EPSS 0.78%6.5CVE-2022-29900Debian linux vulnerabilityMis-trained branch predictions for return instructions may allow arbitrary speculative code execution under certain microarchitecture-dependent condi…EPSS 3.9%6.5CVE-2022-23823Amd athlon x4 750 firmware observable discrepancy vulnerabilityA potential vulnerability in some AMD processors using frequency scaling may allow an authenticated attacker to execute a timing attack to potentiall…EPSS 1.2%5.6CVE-2021-26401Amd athlon x4 940 firmware vulnerabilityLFENCE/JMP (mitigation V2-2) may not sufficiently mitigate CVE-2017-5715 on some AMD CPUs.EPSS 0.29%5.5CVE-2022-23824Xen vulnerabilityIBPB may not prevent return branch predictions from being specified by pre-IBPB branch targets leading to a potential information disclosure.EPSS 0.59%4.7CVE-2022-27672Amd athlon x4 750 firmware vulnerabilityWhen SMT is enabled, certain AMD processors may speculatively execute instructions using a target from the sibling thread after an SMT mode switch po…EPSS 0.28%

Source: NIST National Vulnerability Database (record CVE-2021-26341), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.