{"cve":"CVE-2021-46755","nvd":{"published":"2023-05-09T20:15:12.157","modified":"2026-06-17T04:15:27.240","status":"Modified","description":"Failure to unmap certain SysHub mappings in\nerror paths of the ASP (AMD Secure Processor) bootloader may allow an attacker\nwith a malicious bootloader to exhaust the SysHub resources resulting in a\npotential denial of service.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":[],"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"],"products":["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","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"],"source":"nvd","synced_at":"2026-10-19T21:38:18.424950729+00:00"},"epss":{"cve":"CVE-2021-46755","score":0.00616,"percentile":0.49529,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}