{"id":"CVE-2026-43842","kind":"vulnerability","aliases":["CVE-2026-43842"],"related":[],"title":"License manager service crashes when an unauthenticated message has zero length","description":"A NULL pointer dereference vulnerability in the license manager service could allow an unauthenticated attacker to crash the service via the rpc_rx_fsm function when msglen is set to 0.","summary":"A NULL pointer dereference in the license manager service's rpc_rx_fsm function is triggered when msglen is 0. An unauthenticated attacker can crash the service, causing denial of service.","severity":"medium","cvss":6.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["license-manager","other"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-10-20T09:17:10+00:00","first_seen_at":"2026-10-23T21:57:20+00:00","triaged_at":"2026-10-25T03:40:34+00:00","updated_at":"2026-10-25T03:40:34+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-10-25T03:40:34Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"unknown","title":"License manager service crashes when an unauthenticated message has zero length","impact":"low","summary":"A NULL pointer dereference in the license manager service's rpc_rx_fsm function is triggered when msglen is 0. An unauthenticated attacker can crash the service, causing denial of service.","category":"other","nicknames":[],"who_cares":["license-manager"],"confidence":0.5,"needs_auth":"no","worst_case":"Unauthenticated attacker crashes the license manager service remotely","analyst_note":"Identify the vendor product and affected versions from the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2026-43842; the sources do not name the product.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000495,"input_tokens":3278,"output_tokens":335,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A '-43842':14A,17A '0':40B,82C 'allow':63C 'attack':43B,66C 'caus':48B 'could':62C 'crash':4A,45B,68C 'cve':12A,15A 'denial':49B 'derefer':24B,55C 'fsm':33B,75C 'function':34B,76C 'length':11A 'licens':1A,19B,27B,59C 'license-manag':18B 'manag':2A,20B,28B,60C 'messag':8A 'msglen':38B,78C 'null':22B,53C 'pointer':23B,54C 'rpc':31B,73C 'rx':32B,74C 'servic':3A,29B,47B,51B,61C,70C 'set':80C 'trigger':36B 'unauthent':7A,42B,65C 'via':71C 'vulner':56C 'zero':10A","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-2026-43842","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43842","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"}