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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.006 (48.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
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
- www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001 (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.