{"id":"CVE-2026-43840","kind":"vulnerability","aliases":["CVE-2026-43840"],"related":[],"title":"License manager service crashes via NULL pointer in disconnect callback","description":"A NULL pointer dereference vulnerability in the license manager service could allow an unauthenticated attacker to crash the service via the on_disconnected callback function.","summary":"A NULL pointer dereference in the license manager service's on_disconnected callback lets an unauthenticated attacker crash the service. The sources describe only a denial of service, not code execution or data access.","severity":"medium","cvss":6.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["license-manager","other"],"not_affected_if":[],"how_to_check":"- unknown","fix":"- unknown","status":"open","published_at":"2026-10-20T09:17:10+00:00","first_seen_at":"2026-10-23T21:57:20+00:00","triaged_at":"2026-10-25T03:40:35+00:00","updated_at":"2026-10-25T03:40:35+00:00","category":"other","confidence":0.4,"triage":{"at":"2026-10-25T03:40:35Z","model":"claude-haiku-5-5","output":{"fix":"- unknown","reach":"unknown","title":"License manager service crashes via NULL pointer in disconnect callback","impact":"low","summary":"A NULL pointer dereference in the license manager service's on_disconnected callback lets an unauthenticated attacker crash the service. The sources describe only a denial of service, not code execution or data access.","category":"other","nicknames":[],"who_cares":["license-manager"],"confidence":0.4,"needs_auth":"no","worst_case":"Unauthenticated attacker crashes the license manager service repeatedly","analyst_note":"Find the affected product and versions from the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2026-43840, then identify the vendor advisory for the fixed version and the reach of the service.","how_to_check":"- unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000502,"input_tokens":3267,"output_tokens":351,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':12A,15A '-43840':13A,16A 'access':53B 'allow':65C 'attack':36B,68C 'callback':10A,32B,77C 'code':49B 'could':64C 'crash':4A,37B,70C 'cve':11A,14A 'data':52B 'denial':45B 'derefer':23B,57C 'describ':42B 'disconnect':9A,31B,76C 'execut':50B 'function':78C 'let':33B 'licens':1A,18B,26B,61C 'license-manag':17B 'manag':2A,19B,27B,62C 'null':6A,21B,55C 'pointer':7A,22B,56C 'servic':3A,28B,39B,47B,63C,72C 'sourc':41B 'unauthent':35B,67C 'via':5A,73C 'vulner':58C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T09:17:10+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"5f57b9bf-260d-4433-bf07-b6a79e9bb7d4","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-43840","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43840","severity":null,"published_at":"2026-10-20T09:17:10+00:00","modified_at":"2026-10-20T19:30:59+00:00","first_seen_at":"2026-10-23T21:57:20+00:00","fetched_at":"2026-10-23T22:28:57+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}