What’s Vulnerable › Vulnerabilities
CVE-2021-46755
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2023-05-09 · updated 2026-06-17
Description
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.
Affected products
- AMD Ryzen 3100 Firmware: comboam4_v2_pi_1.2.0.8, comboam4pi_1.0.0.9
- AMD Ryzen 3300X Firmware: comboam4_v2_pi_1.2.0.8, comboam4pi_1.0.0.9
- AMD Ryzen 3500 Firmware: comboam4_v2_pi_1.2.0.8, comboam4pi_1.0.0.9
- AMD Ryzen 3500X Firmware: comboam4_v2_pi_1.2.0.8, comboam4pi_1.0.0.9
- AMD Ryzen 3600 Firmware: comboam4_v2_pi_1.2.0.8, comboam4pi_1.0.0.9
- AMD Ryzen 3600X Firmware: comboam4_v2_pi_1.2.0.8, comboam4pi_1.0.0.9
- AMD Ryzen 3600Xt Firmware: comboam4_v2_pi_1.2.0.8, comboam4pi_1.0.0.9
- AMD Ryzen 3800X Firmware: comboam4_v2_pi_1.2.0.8, comboam4pi_1.0.0.9
- AMD Ryzen 3800Xt Firmware: comboam4_v2_pi_1.2.0.8, comboam4pi_1.0.0.9
- AMD Ryzen 3900 Firmware: comboam4_v2_pi_1.2.0.8, comboam4pi_1.0.0.9
- AMD Ryzen 3900X Firmware: comboam4_v2_pi_1.2.0.8, comboam4pi_1.0.0.9
- AMD Ryzen 3900Xt Firmware: comboam4_v2_pi_1.2.0.8, comboam4pi_1.0.0.9
- AMD Ryzen 3950X Firmware: comboam4_v2_pi_1.2.0.8, comboam4pi_1.0.0.9
- AMD Ryzen 5500 Firmware: comboam4_v2_pi_1.2.0.8, comboam4v2_pi_1.2.0.6
- AMD Ryzen 5600 Firmware: comboam4_v2_pi_1.2.0.8, comboam4v2_pi_1.2.0.6
- AMD Ryzen 5600G Firmware: comboam4_v2_pi_1.2.0.8, comboam4v2_pi_1.2.0.6
- AMD Ryzen 5600X Firmware: comboam4_v2_pi_1.2.0.8, comboam4v2_pi_1.2.0.6
- AMD Ryzen 5700G Firmware: comboam4_v2_pi_1.2.0.8, comboam4v2_pi_1.2.0.6
- AMD Ryzen 5700X Firmware: comboam4_v2_pi_1.2.0.8, comboam4v2_pi_1.2.0.6
- AMD Ryzen 5800X3D Firmware: comboam4_v2_pi_1.2.0.8, comboam4v2_pi_1.2.0.6
- AMD Ryzen 5800X Firmware: comboam4_v2_pi_1.2.0.8, comboam4v2_pi_1.2.0.6
- AMD Ryzen 5900X Firmware: comboam4_v2_pi_1.2.0.8, comboam4v2_pi_1.2.0.6
- AMD Ryzen 5950X Firmware: comboam4_v2_pi_1.2.0.8, comboam4v2_pi_1.2.0.6
References
- https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001
- https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001
Get alerted when CVE-2021-46755 or the next vulnerability affects your stack