CVE-2021-46755
Failure to unmap certain SysHub mappings in error paths of the ASP (AMD Secure Processor)...
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 potential denial of service.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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 potential denial of service.
- Record
CVE-2021-46755- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
CVE List
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 potential denial of service.
- Record
CVE-2021-46755- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
EUVDEUVD-2021-33411
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 potential denial of service.
- Record
EUVD-2021-33411- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-xpf2-4v7h-fpcm
Failure to unmap certain SysHub mappings in error paths of the ASP (AMD Secure Processor)...
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 potential denial of service.
- Record
GHSA-xpf2-4v7h-fpcm- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
- amd 3rd gen amd ryzen™ threadripper™ processors “castle peak” hedt
- amd ryzen™ 5000 series desktop processors “vermeer” am4
- amd ryzen 3100 firmware
- amd ryzen 3300x firmware
- amd ryzen 3500 firmware
- amd ryzen 3500x firmware
- amd ryzen 3600 firmware
- amd ryzen 3600x firmware
- amd ryzen 3600xt firmware
- amd ryzen 3800x firmware
- amd ryzen 3800xt firmware
- amd ryzen 3900 firmware
Show 20 moreShow less
- amd ryzen 3900x firmware
- amd ryzen 3900xt firmware
- amd ryzen 3950x firmware
- amd ryzen 5500 firmware
- amd ryzen 5600 firmware
- amd ryzen 5600g firmware
- amd ryzen 5600x firmware
- amd ryzen 5700g firmware
- amd ryzen 5700x firmware
- amd ryzen 5800x3d firmware
- amd ryzen 5800x firmware
- amd ryzen 5900x firmware
- amd ryzen 5950x firmware
- amd ryzen™ 3000 series desktop processors “matisse” am4
- amd ryzen™ 3000 series mobile processors with radeon™ graphics “renoir”
- amd ryzen™ 5000 series desktop processor with radeon™ graphics “cezanne” am4
- amd ryzen™ 5000 series mobile processors with radeon™ graphics “cezanne”
- amd ryzen™ 5000 series mobile processors with radeon™ graphics “lucienne”
- amd ryzen™ threadripper™ pro processors “castle peak” ws
- amd ryzen™ threadripper™ pro processors “chagall” ws
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-46755 is a high vulnerability (CVSS 7.5) in Amd 3rd Gen Amd Ryzen™ Threadripper™ Processors “castle Peak” Hedt, published May 9, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.62%, the 49th percentile. No source names a fixed version.