{"id":"CVE-2023-2234","aliases":["EUVD-2023-33744","GHSA-fx9g-8fr2-q899"],"status":"published","title":"BT HCI host union variant confusion","description":"Union variant confusion allows any malicious BT controller to execute arbitrary code on the Zephyr host.","severity":{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00497,"percentile":0.42887,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-843"],"published":"2023-07-10T04:30:14.243Z","modified":"2026-10-28T02:31:12Z","products":[{"vendor":"zephyrproject","product":"zephyr"},{"vendor":"zephyrproject-rtos","product":"zephyr"}],"references":[{"url":"https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fx9g-8fr2-q899","tags":["x_transferred","Not Applicable","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/1xxx/CVE-2023-1902.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-1902","tags":["advisory"]},{"url":"https://github.com/zephyrproject-rtos/zephyr","tags":["package"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/2xxx/CVE-2023-2234.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-2234","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-2234","title":"BT HCI host union variant confusion","description":"Union variant confusion allows any malicious BT controller to execute arbitrary code on the Zephyr host.","status":"published","published":"2023-07-10T04:33:35.254Z","modified":"2024-11-07T15:20:13.942Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T14:35:24.360381Z"}],"euvd":[{"id":"EUVD-2023-33744","description":"Union variant confusion allows any malicious BT controller to execute arbitrary code on the Zephyr host.","status":"published","published":"2023-07-10T04:33:35Z","modified":"2024-11-07T15:20:13Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"updated_at":"2026-11-03T00:05:08.272544Z"}],"nvd":[{"id":"CVE-2023-2234","description":"Union variant confusion allows any malicious BT controller to execute arbitrary code on the Zephyr host.","status":"published","published":"2023-07-10T16:15:51.06Z","modified":"2026-06-17T05:52:03.83Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T14:08:15.127597Z"}],"osv":[{"id":"CVE-2023-1902","title":"HCI Connection Creation Dangling State Reference Re-use","description":"The bluetooth HCI host layer logic not clearing a global reference to a state pointer after handling connection events may allow a malicious HCI Controller to cause the use of a dangling reference in the host layer, leading to a crash (DoS) or potential RCE on the Host layer.","status":"published","published":"2023-07-10T04:30:14.243Z","modified":"2026-10-28T02:31:12.67558175Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:30.334753Z"},{"id":"CVE-2023-2234","title":"BT HCI host union variant confusion","description":"Union variant confusion allows any malicious BT controller to execute arbitrary code on the Zephyr host.","status":"published","published":"2023-07-10T04:33:35.254Z","modified":"2026-10-28T02:30:57.639608302Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T15:44:30.334753Z"}]}}