{"cve":"CVE-2023-20559","nvd":{"published":"2023-04-02T21:15:08.510","modified":"2026-06-17T05:30:18.407","status":"Modified","description":"Insufficient control flow management in AmdCpmGpioInitSmm may allow a privileged attacker to tamper with the SMM handler potentially leading to escalation of privileges.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-691"],"references":["https://www.amd.com/en/resources/product-security/bulletin/amd-sb-1027.html","https://www.amd.com/en/resources/product-security/bulletin/amd-sb-1027.html"],"products":["amd:athlon_gold_3150u_firmware","amd:athlon_silver_3050u_firmware","amd:ryzen_3_2200u_firmware","amd:ryzen_3_2300u_firmware","amd:ryzen_3_3200u_firmware","amd:ryzen_3_3250u_firmware","amd:ryzen_3_3300u_firmware","amd:ryzen_3_3300x_firmware","amd:ryzen_3_3350u_firmware","amd:ryzen_3_3450u_firmware","amd:ryzen_3_3500c_firmware","amd:ryzen_3_3500u_firmware","amd:ryzen_3_3550h_firmware","amd:ryzen_3_3580u_firmware","amd:ryzen_3_3700c_firmware","amd:ryzen_3_3700u_firmware","amd:ryzen_3_3750h_firmware","amd:ryzen_3_3780u_firmware","amd:ryzen_3_4300g_firmware","amd:ryzen_3_4300ge_firmware","amd:ryzen_3_5125c_firmware","amd:ryzen_3_5300g_firmware","amd:ryzen_3_5300ge_firmware","amd:ryzen_3_5400u_firmware","amd:ryzen_3_5425c_firmware","amd:ryzen_3_5425u_firmware","amd:ryzen_5_2500u_firmware","amd:ryzen_5_2600_firmware","amd:ryzen_5_2600h_firmware","amd:ryzen_5_2600x_firmware","amd:ryzen_5_2700_firmware","amd:ryzen_5_2700x_firmware","amd:ryzen_5_3500_firmware","amd:ryzen_5_3500x_firmware","amd:ryzen_5_3600_firmware","amd:ryzen_5_3600x_firmware","amd:ryzen_5_3600xt_firmware","amd:ryzen_5_4600g_firmware","amd:ryzen_5_4600ge_firmware","amd:ryzen_5_5560u_firmware","amd:ryzen_5_5600g_firmware","amd:ryzen_5_5600ge_firmware","amd:ryzen_5_5600h_firmware","amd:ryzen_5_5600hs_firmware","amd:ryzen_5_5600u_firmware","amd:ryzen_5_5625c_firmware","amd:ryzen_5_5625u_firmware","amd:ryzen_7_2700_firmware","amd:ryzen_7_2700u_firmware","amd:ryzen_7_2700x_firmware"],"source":"nvd","synced_at":"2026-10-19T21:37:48.383111019+00:00"},"epss":{"cve":"CVE-2023-20559","score":0.00667,"percentile":0.51887,"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."]}