Vulnerability in Amd 3rd Gen Ryzen™ Threadripper™ Processors “Castle Peak” Hedt
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 potential denial of service.
EPSS: 0.006 (45.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Amd 3rd Gen Ryzen™ Threadripper™ Processors “Castle Peak” Hedt — versions various
- Amd Ryzen™ 5000 Series Desktop Processors “Vermeer” Am4 — versions various
- Amd Ryzen_3100
- Amd Ryzen_3100_firmware — versions comboam4_v2_pi_1.2.0.8, comboam4pi_1.0.0.9
- Amd Ryzen_3300x
- Amd Ryzen_3300x_firmware — versions comboam4_v2_pi_1.2.0.8, comboam4pi_1.0.0.9
- Amd Ryzen_3500
- Amd Ryzen_3500_firmware — versions comboam4_v2_pi_1.2.0.8, comboam4pi_1.0.0.9
- Amd Ryzen_3500x
- Amd Ryzen_3500x_firmware — versions comboam4_v2_pi_1.2.0.8, comboam4pi_1.0.0.9
References
- psirt@amd.com (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-46755?
- CVE-2021-46755 is a high-severity vulnerability in Amd 3rd Gen Ryzen™ Threadripper™ Processors “Castle Peak” Hedt. CVSS score: 7.5/10. Published 2023-05-09.
- How severe is CVE-2021-46755?
- High severity. CVSS v3 base score is 7.5 out of 10.