{"id":"CVE-2026-34017","kind":"vulnerability","aliases":["CVE-2026-34017"],"related":[],"title":"Hyperscan: heap buffer overflow lets a local user crash the process","description":"Heap-based buffer overflow for some Hyperscan before version v5.4.2.1 within Ring 3: User Applications may allow a denial of service. Unprivileged software adversary with an unauthenticated user combined with a low complexity attack may enable denial of service. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires passive user interaction. The potential vulnerability may impact the confidentiality (none), integrity (low) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.","summary":"Hyperscan, Intel's regular expression matching library, has a heap-based buffer overflow in versions before v5.4.2.1. A local, unprivileged user can trigger it to cause a denial of service.","severity":"medium","cvss":5.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["c++","hyperscan","package"],"not_affected_if":["hyperscan-not-used","hyperscan-v5.4.2.1-or-later"],"how_to_check":"- Check the installed Hyperscan version, for example with `pkg-config --modversion libhs` or the version in your build files.\n- Look for Hyperscan in your dependency lists and container images.","fix":"- Hyperscan: move to `v5.4.2.1` or later.","status":"open","published_at":"2026-11-10T18:17:37+00:00","first_seen_at":"2026-11-10T18:22:57+00:00","triaged_at":"2026-11-10T18:25:05+00:00","updated_at":"2026-11-10T18:25:05+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-10T18:25:05Z","model":"claude-haiku-5-5","output":{"fix":"- Hyperscan: move to `v5.4.2.1` or later.","reach":"local","title":"Hyperscan: heap buffer overflow lets a local user crash the process","impact":"low","summary":"Hyperscan, Intel's regular expression matching library, has a heap-based buffer overflow in versions before v5.4.2.1. A local, unprivileged user can trigger it to cause a denial of service.","audience":"developers","category":"package","nicknames":[],"who_cares":["hyperscan","c++"],"confidence":0.6,"fix_status":"available","needs_auth":"yes","worst_case":"local user crashes the process and disrupts service","analyst_note":"","how_to_check":"- Check the installed Hyperscan version, for example with `pkg-config --modversion libhs` or the version in your build files.\n- Look for Hyperscan in your dependency lists and container images.","plain_action":"","product_name":"","needs_analyst":false,"not_affected_if":["hyperscan-not-used","hyperscan-v5.4.2.1-or-later"],"who_is_affected":"Teams that build or ship software linking Hyperscan for pattern matching, especially where untrusted local users can reach the matching path. The sources do not say which products or configurations use it in a way that exposes them. Systems that do not include Hyperscan are not affected.","user_interaction":"yes","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000719,"input_tokens":4660,"output_tokens":505,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A '-34017':14A,17A '3':65C 'access':99C 'adversari':76C 'allow':69C 'applic':67C 'attack':86C,101C 'avail':125C,140C 'base':32B,54C 'buffer':3A,33B,55C 'c':18B 'caus':47B 'combin':81C 'complex':85C 'confidenti':120C,135C 'crash':9A 'cve':12A,15A 'denial':49B,71C,89C 'enabl':88C 'express':25B 'heap':2A,31B,53C 'heap-bas':30B,52C 'high':126C 'hyperscan':1A,19B,21B,59C 'impact':118C,142C 'integr':122C,137C 'intel':22B 'interact':113C 'intern':107C 'knowledg':108C 'let':5A 'librari':27B 'local':7A,40B,98C 'low':84C,123C 'match':26B 'may':68C,87C,94C,117C 'none':121C,136C,138C,141C 'occur':96C 'overflow':4A,34B,56C 'packag':20B 'passiv':111C 'potenti':95C,115C 'present':104C 'process':11A 'regular':24B 'requir':102C,110C 'result':93C,131C 'ring':64C 'servic':51B,73C,91C 'softwar':75C 'special':106C 'subsequ':133C 'system':130C,134C 'trigger':44B 'unauthent':79C 'unprivileg':41B,74C 'user':8A,42B,66C,80C,112C 'v5.4.2.1':38B,62C 'version':36B,61C 'via':97C 'vulner':116C,129C 'within':63C 'without':105C","nicknames":[],"mitigations":[],"who_affected":"Teams that build or ship software linking Hyperscan for pattern matching, especially where untrusted local users can reach the matching path. The sources do not say which products or configurations use it in a way that exposes them. Systems that do not include Hyperscan are not affected.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"developers","plain_action":null,"pkeys":[],"ptokens":[],"labels":["c","hyperscan","medium","package"],"campaign_type":null,"search_a":"'-2026':13A,16A '-34017':14A,17A 'buffer':3A 'crash':9A 'cve':12A,15A 'heap':2A 'hyperscan':1A 'let':5A 'local':7A 'overflow':4A 'process':11A 'user':8A","search_b":"'base':32B 'buffer':33B 'c':18B 'caus':47B 'denial':49B 'express':25B 'heap':31B 'heap-bas':30B 'hyperscan':19B,21B 'intel':22B 'librari':27B 'local':40B 'match':26B 'overflow':34B 'packag':20B 'regular':24B 'servic':51B 'trigger':44B 'unprivileg':41B 'user':42B 'v5.4.2.1':38B 'version':36B","search_c":"'3':65C 'access':99C 'adversari':76C 'allow':69C 'applic':67C 'attack':86C,101C 'avail':125C,140C 'base':54C 'buffer':55C 'combin':81C 'complex':85C 'confidenti':120C,135C 'denial':71C,89C 'enabl':88C 'heap':53C 'heap-bas':52C 'high':126C 'hyperscan':59C 'impact':118C,142C 'integr':122C,137C 'interact':113C 'intern':107C 'knowledg':108C 'local':98C 'low':84C,123C 'may':68C,87C,94C,117C 'none':121C,136C,138C,141C 'occur':96C 'overflow':56C 'passiv':111C 'potenti':95C,115C 'present':104C 'requir':102C,110C 'result':93C,131C 'ring':64C 'servic':73C,91C 'softwar':75C 'special':106C 'subsequ':133C 'system':130C,134C 'unauthent':79C 'unprivileg':74C 'user':66C,80C,112C 'v5.4.2.1':62C 'version':61C 'via':97C 'vulner':116C,129C 'within':63C 'without':105C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T18:17:37+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:H/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":"secure@intel.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-34017","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34017","severity":null,"published_at":"2026-11-10T18:17:37+00:00","modified_at":"2026-11-10T18:17:37+00:00","first_seen_at":"2026-11-10T18:22:57+00:00","fetched_at":"2026-11-10T18:22:57+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}