{"id":"CVE-2026-58786","kind":"vulnerability","aliases":["CVE-2026-58786"],"related":[],"title":"hevc_decoder: buffer overflow in cnm_memset allows local privilege escalation","description":"In cnm_memset of hevc_decoder, there is a possible Non-Heap Buffer Overflow due to a buffer overflow. This could lead to local escalation of privilege with execution privileges needed. User interaction is for exploitation.","summary":"A buffer overflow in the cnm_memset function of the hevc_decoder component lets a local process write outside its buffer. An attacker who can already run code on the device could escalate privileges.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"hevc_decoder","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["hevc-decoder","infrastructure"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T20:19:25+00:00","first_seen_at":"2026-11-10T20:46:10+00:00","triaged_at":"2026-11-10T20:51:44+00:00","updated_at":"2026-11-10T20:51:44+00:00","category":"infrastructure","confidence":0.3,"triage":{"at":"2026-11-10T20:51:44Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"hevc_decoder: buffer overflow in cnm_memset allows local privilege escalation","impact":"high","summary":"A buffer overflow in the cnm_memset function of the hevc_decoder component lets a local process write outside its buffer. An attacker who can already run code on the device could escalate privileges.","audience":"everyone","category":"infrastructure","nicknames":[],"who_cares":["hevc-decoder"],"confidence":0.3,"fix_status":"unknown","needs_auth":"unknown","worst_case":"Local code gains elevated privileges on the affected device","analyst_note":"Identify the vendor and affected versions of hevc_decoder and the fixed build from the NVD entry (https://nvd.nist.gov/vuln/detail/CVE-2026-58786) or the vendor bulletin.","how_to_check":"unknown","plain_action":"","product_name":"hevc_decoder","needs_analyst":true,"not_affected_if":[],"who_is_affected":"The sources name only the hevc_decoder component and do not list affected products or versions. Devices with that decoder need a local attacker who can already execute code. unknown","user_interaction":"yes","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.00068,"input_tokens":4530,"output_tokens":454,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A '-58786':14A,17A 'allow':8A 'alreadi':49B 'attack':46B 'buffer':3A,25B,44B,71C,76C 'cnm':6A,29B,59C 'code':51B 'compon':36B 'could':55B,79C 'cve':12A,15A 'decod':2A,22B,35B,63C 'decoder':19A 'devic':54B 'due':73C 'escal':11A,56B,83C 'execut':87C 'exploit':94C 'function':31B 'heap':70C 'hevc':1A,18A,21B,34B,62C 'hevc-decod':20B 'infrastructur':23B 'interact':91C 'lead':80C 'let':37B 'local':9A,39B,82C 'memset':7A,30B,60C 'need':89C 'non':69C 'non-heap':68C 'outsid':42B 'overflow':4A,26B,72C,77C 'possibl':67C 'privileg':10A,57B,85C,88C 'process':40B 'run':50B 'user':90C 'write':41B","nicknames":[],"mitigations":[],"who_affected":"The sources name only the hevc_decoder component and do not list affected products or versions. Devices with that decoder need a local attacker who can already execute code. unknown","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"everyone","plain_action":null,"pkeys":["hevcdecoder"],"ptokens":["decoder","hevc"],"labels":["hevcdecoder","infrastructure","unknown","vendor"],"campaign_type":null,"search_a":"'-2026':13A,16A '-58786':14A,17A 'allow':8A 'buffer':3A 'cnm':6A 'cve':12A,15A 'decod':2A 'decoder':19A 'escal':11A 'hevc':1A,18A 'local':9A 'memset':7A 'overflow':4A 'privileg':10A","search_b":"'alreadi':49B 'attack':46B 'buffer':25B,44B 'cnm':29B 'code':51B 'compon':36B 'could':55B 'decod':22B,35B 'devic':54B 'escal':56B 'function':31B 'hevc':21B,34B 'hevc-decod':20B 'infrastructur':23B 'let':37B 'local':39B 'memset':30B 'outsid':42B 'overflow':26B 'privileg':57B 'process':40B 'run':50B 'write':41B","search_c":"'buffer':71C,76C 'cnm':59C 'could':79C 'decod':63C 'due':73C 'escal':83C 'execut':87C 'exploit':94C 'heap':70C 'hevc':62C 'interact':91C 'lead':80C 'local':82C 'memset':60C 'need':89C 'non':69C 'non-heap':68C 'overflow':72C,77C 'possibl':67C 'privileg':85C,88C 'user':90C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T20:19:25+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-58786","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58786","severity":null,"published_at":"2026-11-10T20:19:25+00:00","modified_at":"2026-11-10T20:19:25+00:00","first_seen_at":"2026-11-10T20:46:10+00:00","fetched_at":"2026-11-10T20:46:10+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"}