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CVE record · CVE-2021-46755

Failure to unmap certain SysHub mappings in error paths of the ASP (AMD Secure Processor) bootloader may allow an attacker with a malicious bootloader to exhaust the SysHub resources resulting in a p…

CVSS 7.5 HighEPSS 0.0062 · 49th percentile

Published by the CVE Program (CNA: AMD) at 9 May 2023, 19:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
AMD Ryzen™ 3000 Series Desktop Processors “Matisse” AM4 Package name: AGESA
  • affected various
Other versions: unaffected
AMD AMD Ryzen™ 5000 Series Desktop Processors “Vermeer” AM4 Package name: AGESA
  • affected various
Other versions: unaffected
AMD Ryzen™ 5000 Series Desktop processor with Radeon™ Graphics “Cezanne” AM4 Package name: AGESA
  • affected various
Other versions: unaffected
AMD 3rd Gen AMD Ryzen™ Threadripper™ Processors “Castle Peak” HEDT Package name: AGESA
  • affected various
Other versions: unaffected
AMD Ryzen™ Threadripper™ PRO Processors “Castle Peak” WS Package name: AGESA
  • affected various
Other versions: unaffected
AMD Ryzen™ Threadripper™ PRO Processors “Chagall” WS Package name: AGESA
  • affected various
Other versions: unaffected
AMD Ryzen™ 3000 Series Mobile Processors with Radeon™ Graphics “Renoir” Package name: AGESA
  • affected various
Other versions: unaffected
AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics “Lucienne” Package name: AGESA
  • affected various
Other versions: unaffected
AMD Ryzen™ 5000 Series Mobile processors with Radeon™ Graphics “Cezanne” Package name: AGESA
  • affected various
Other versions: unaffected
Identifiers
CVE-2021-46755
CNA
AMD
Tags
Published
9 May 2023
Updated
28 Jan 2025

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H ADP (CISA-ADP)
  • CISA KEV Not listed.
  • EPSS 0.0062, the 49th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 9 May 2023. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.