{"id":"CVE-2026-120740","kind":"vulnerability","aliases":["CVE-2026-120740"],"related":[],"title":"hivex: crafted registry hive file causes out-of-bounds read and crash","description":"A flaw was found in hivex. By supplying a specially crafted Windows registry hive file, an attacker can trigger an out-of-bounds memory read when hivex parses registry values containing malformed large data block lists. This issue can cause the application processing the registry file to crash, resulting in a Denial of Service (DoS).","summary":"hivex is a library for reading Windows registry hive files. A specially crafted hive file with malformed large data block lists makes it read memory out of bounds, which can crash the program that parses the file.","severity":"low","cvss":2.0,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["hivex","package","registry-parsing"],"not_affected_if":["trusted-input-only"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-02T22:17:21+00:00","first_seen_at":"2026-11-02T22:35:43+00:00","triaged_at":"2026-11-02T22:37:51+00:00","updated_at":"2026-11-02T22:37:51+00:00","category":"package","confidence":0.5,"triage":{"at":"2026-11-02T22:37:51Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"unknown","title":"hivex: crafted registry hive file causes out-of-bounds read and crash","impact":"low","summary":"hivex is a library for reading Windows registry hive files. A specially crafted hive file with malformed large data block lists makes it read memory out of bounds, which can crash the program that parses the file.","audience":"developers","category":"package","nicknames":[],"who_cares":["hivex","registry-parsing"],"confidence":0.5,"fix_status":"unknown","needs_auth":"unknown","worst_case":"application parsing the hive file crashes, denial of service","analyst_note":"","how_to_check":"- unknown","plain_action":"","needs_analyst":false,"not_affected_if":["trusted-input-only"],"who_is_affected":"Programs that use hivex to parse Windows registry hive files from untrusted sources can be crashed by a malicious file. Systems that only read registry files they generate themselves are unlikely to be exposed. unknown whether the sources list affected versions.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"low"},"cost_usd":0.000605,"input_tokens":4100,"output_tokens":390,"severity_before":"low"},"analyst_status":null,"analyst_note":null,"search":"'-120740':16A,19A '-2026':15A,18A 'applic':104C 'attack':78C 'block':44B,97C 'bound':10A,52B,85C 'caus':6A,102C 'contain':93C 'craft':2A,37B,72C 'crash':13A,55B,110C 'cve':14A,17A 'data':43B,96C 'denial':114C 'dos':117C 'file':5A,34B,39B,61B,76C,108C 'flaw':63C 'found':65C 'hive':4A,33B,38B,75C 'hivex':1A,20B,25B,67C,89C 'issu':100C 'larg':42B,95C 'librari':28B 'list':45B,98C 'make':46B 'malform':41B,94C 'memori':49B,86C 'out-of-bound':7A,82C 'packag':21B 'pars':24B,59B,90C 'process':105C 'program':57B 'read':11A,30B,48B,87C 'registri':3A,23B,32B,74C,91C,107C 'registry-pars':22B 'result':111C 'servic':116C 'special':36B,71C 'suppli':69C 'trigger':80C 'valu':92C 'window':31B,73C","nicknames":[],"mitigations":[],"who_affected":"Programs that use hivex to parse Windows registry hive files from untrusted sources can be crashed by a malicious file. Systems that only read registry files they generate themselves are unlikely to be exposed. unknown whether the sources list affected versions.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"developers","plain_action":null,"pkeys":[],"ptokens":[],"labels":["hivex","low","package","registryparsing"],"first_public_at":"2026-11-02T22:17:21+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:L","cvss_by":"secalert@redhat.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-120740","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-120740","severity":null,"published_at":"2026-11-02T22:17:21+00:00","modified_at":"2026-11-02T22:17:21+00:00","first_seen_at":"2026-11-02T22:35:43+00:00","fetched_at":"2026-11-02T22:35:43+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"}