{"id":"CVE-2021-46795","aliases":["EUVD-2021-33451","GHSA-wfj9-288h-5mpm"],"status":"published","title":"A TOCTOU (time-of-check to time-of-use) vulnerability exists where an attacker may use a...","description":"A TOCTOU (time-of-check to time-of-use) vulnerability exists where an attacker may use a compromised BIOS to cause the TEE OS to read memory out of bounds that could potentially result in a denial of service.","severity":{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00141,"percentile":0.03479,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-367"],"published":"2023-01-10T20:53:25Z","modified":"2026-06-17T04:15:35Z","products":[{"vendor":"amd","product":"cezannepi-fp6_firmware"},{"vendor":"amd","product":"comboam4v2_pi_firmware"},{"vendor":"amd","product":"renoirpi-fp6_firmware"},{"vendor":"amd","product":"ryzen 3000 series"},{"vendor":"amd","product":"ryzen 5000 series"}],"references":[{"url":"https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1031","tags":["x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-46795"},{"url":"https://github.com/advisories/GHSA-wfj9-288h-5mpm"}],"sources":{"cve":[{"id":"CVE-2021-46795","description":"A TOCTOU (time-of-check to time-of-use) vulnerability exists where an attacker may use a compromised BIOS to cause the TEE OS to read memory out of bounds that could potentially result in a denial of service.","status":"published","published":"2023-01-10T20:53:25.868Z","modified":"2025-04-09T15:13:26.855Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"adp"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T14:33:02.930115Z"}],"euvd":[{"id":"EUVD-2021-33451","description":"A TOCTOU (time-of-check to time-of-use) vulnerability exists where an attacker may use a compromised BIOS to cause the TEE OS to read memory out of bounds that could potentially result in a denial of service.","status":"published","published":"2023-01-10T20:53:25Z","modified":"2025-04-09T15:13:26Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/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-wfj9-288h-5mpm","title":"A TOCTOU (time-of-check to time-of-use) vulnerability exists where an attacker may use a...","description":"A TOCTOU (time-of-check to time-of-use) vulnerability exists where an attacker may use a compromised BIOS to cause the TEE OS to read memory out of bounds that could potentially result in a denial of service.","status":"published","published":"2023-01-11T09:30:30Z","modified":"2023-01-28T05:06:07Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T14:44:24.376453Z"}],"nvd":[{"id":"CVE-2021-46795","description":"A TOCTOU (time-of-check to time-of-use) vulnerability exists where an attacker may use a compromised BIOS to cause the TEE OS to read memory out of bounds that could potentially result in a denial of service.","status":"published","published":"2023-01-11T08:15:13.347Z","modified":"2026-06-17T04:15:35.72Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T14:07:07.323379Z"}]}}