{"id":"CVE-2023-27373","aliases":["EUVD-2023-31149","GHSA-79rc-fcmg-3r4m"],"status":"published","title":"An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Due to insufficient...","description":"An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Due to insufficient input validation, an attacker can tamper with a runtime-accessible EFI variable to cause a dynamic BAR setting to overlap SMRAM.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00173,"percentile":0.06867,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2023-08-07T00:00:00Z","modified":"2026-06-17T05:44:54Z","products":[{"vendor":"insyde","product":"insydeh2o"}],"references":[{"url":"https://www.insyde.com/security-pledge/SA-2023035","tags":["x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-27373"},{"url":"https://github.com/advisories/GHSA-79rc-fcmg-3r4m"}],"sources":{"cve":[{"id":"CVE-2023-27373","description":"An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Due to insufficient input validation, an attacker can tamper with a runtime-accessible EFI variable to cause a dynamic BAR setting to overlap SMRAM.","status":"published","published":"2023-08-07T00:00:00Z","modified":"2025-03-07T19:25:36.184Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"adp"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:35:26.63732Z"}],"euvd":[{"id":"EUVD-2023-31149","description":"An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Due to insufficient input validation, an attacker can tamper with a runtime-accessible EFI variable to cause a dynamic BAR setting to overlap SMRAM.","status":"published","published":"2023-08-07T00:00:00Z","modified":"2025-03-07T19:25:36Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T20:53:10.22972Z"}],"ghsa":[{"id":"GHSA-79rc-fcmg-3r4m","title":"An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Due to insufficient...","description":"An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Due to insufficient input validation, an attacker can tamper with a runtime-accessible EFI variable to cause a dynamic BAR setting to overlap SMRAM.","status":"published","published":"2023-08-07T15:30:28Z","modified":"2024-04-04T06:35:45Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:56:43.722866Z"}],"nvd":[{"id":"CVE-2023-27373","description":"An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Due to insufficient input validation, an attacker can tamper with a runtime-accessible EFI variable to cause a dynamic BAR setting to overlap SMRAM.","status":"published","published":"2023-08-07T15:15:10.893Z","modified":"2026-06-17T05:44:54.013Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","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:H/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:08:20.798312Z"}]}}