Medium severity5.5NVD Advisory· Published May 9, 2023· Updated Jun 17, 2026
CVE-2021-26371
CVE-2021-26371
Description
A compromised or malicious ABL or UApp could send a SHA256 system call to the bootloader, which may result in exposure of ASP memory to userspace, potentially leading to information disclosure.
Affected products
14- AMD/1st Gen AMD EPYC™ Processorsv5Range: various
- AMD/2nd Gen AMD EPYC™ Processorsv5Range: various
- AMD/3rd Gen AMD EPYC™ Processorsv5Range: various
- AMD/3rd Gen AMD Ryzen™ Threadripper™ Processors “Castle Peak” HEDTv5Range: various
- AMD/AMD Ryzen™ 5000 Series Desktop Processors “Vermeer” AM4v5Range: various
- AMD/Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Dali”/”Dali” ULPv5Range: various
- AMD/Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Pollock”v5Range: various
- AMD/Ryzen™ 2000 series Desktop Processors “Raven Ridge” AM4v5Range: various
- AMD/Ryzen™ 2000 Series Mobile Processors “Raven Ridge” FP5v5Range: various
- AMD/Ryzen™ 3000 Series Desktop Processors “Matisse” AM4v5Range: various
- AMD/Ryzen™ 3000 Series Mobile processor, 2nd Gen AMD Ryzen™ Mobile Processors with Radeon™ Graphics “Picasso”v5Range: various
- AMD/Ryzen™ Threadripper™ PRO Processors “Castle Peak” WSv5Range: various
- AMD/Ryzen™ Threadripper™ PRO Processors “Chagall” WSv5Range: various
Patches
Vulnerability mechanics
References
2- www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001nvdVendor Advisory
- www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001nvdVendor Advisory
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