{"id":"CVE-2021-26355","aliases":["EUVD-2021-13161","GHSA-p4w7-qphw-gm3c"],"status":"published","title":"Insufficient fencing and checks in System Management Unit (SMU) may result in access to invalid...","description":"Insufficient fencing and checks in System Management Unit (SMU) may result in access to invalid message port registers that could result in a potential denial-of-service.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00176,"percentile":0.07117,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400","CWE-693"],"published":"2023-01-10T20:56:37Z","modified":"2026-06-17T03:43:13Z","products":[{"vendor":"amd","product":"3rd gen epyc"},{"vendor":"amd","product":"epyc_7003_firmware"},{"vendor":"amd","product":"epyc_72f3_firmware"},{"vendor":"amd","product":"epyc_7313_firmware"},{"vendor":"amd","product":"epyc_7313p_firmware"},{"vendor":"amd","product":"epyc_7343_firmware"},{"vendor":"amd","product":"epyc_7373x_firmware"},{"vendor":"amd","product":"epyc_73f3_firmware"},{"vendor":"amd","product":"epyc_7413_firmware"},{"vendor":"amd","product":"epyc_7443_firmware"},{"vendor":"amd","product":"epyc_7443p_firmware"},{"vendor":"amd","product":"epyc_7453_firmware"},{"vendor":"amd","product":"epyc_74f3_firmware"},{"vendor":"amd","product":"epyc_7513_firmware"},{"vendor":"amd","product":"epyc_7543_firmware"},{"vendor":"amd","product":"epyc_7543p_firmware"},{"vendor":"amd","product":"epyc_7573x_firmware"},{"vendor":"amd","product":"epyc_75f3_firmware"},{"vendor":"amd","product":"epyc_7643_firmware"},{"vendor":"amd","product":"epyc_7663_firmware"},{"vendor":"amd","product":"epyc_7713_firmware"},{"vendor":"amd","product":"epyc_7713p_firmware"},{"vendor":"amd","product":"epyc_7743_firmware"},{"vendor":"amd","product":"epyc_7763_firmware"},{"vendor":"amd","product":"epyc_7773x_firmware"}],"references":[{"url":"https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032","tags":["vendor-advisory","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26355"},{"url":"https://github.com/advisories/GHSA-p4w7-qphw-gm3c"}],"sources":{"cve":[{"id":"CVE-2021-26355","description":"Insufficient fencing and checks in System Management Unit (SMU) may result in access to invalid message port registers that could result in a potential denial-of-service.\n\n","status":"published","published":"2023-01-10T20:56:37.81Z","modified":"2025-04-09T14:56:35.656Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"adp"}],"cwes":["CWE-693"],"updated_at":"2026-11-02T14:32:57.033395Z"}],"euvd":[{"id":"EUVD-2021-13161","description":"Insufficient fencing and checks in System Management Unit (SMU) may result in access to invalid message port registers that could result in a potential denial-of-service.\n\n","status":"published","published":"2023-01-10T20:56:37Z","modified":"2025-04-09T14:56:35Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T20:52:38.263259Z"}],"ghsa":[{"id":"GHSA-p4w7-qphw-gm3c","title":"Insufficient fencing and checks in System Management Unit (SMU) may result in access to invalid...","description":"Insufficient fencing and checks in System Management Unit (SMU) may result in access to invalid message port registers that could result in a potential denial-of-service.","status":"published","published":"2023-01-11T09:30:30Z","modified":"2025-04-09T15:33:02Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-400","CWE-693"],"updated_at":"2026-11-02T15:01:02.112182Z"}],"nvd":[{"id":"CVE-2021-26355","description":"Insufficient fencing and checks in System Management Unit (SMU) may result in access to invalid message port registers that could result in a potential denial-of-service.\n\n","status":"published","published":"2023-01-11T08:15:11.383Z","modified":"2026-06-17T03:43:13.31Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-693"],"updated_at":"2026-11-02T14:07:07.323379Z"}]}}