{"id":"CVE-2026-124312","kind":"vulnerability","aliases":["CVE-2026-124312"],"related":[],"title":"VVdeC: crafted VVC bitstream makes the decoder read out of bounds","description":"Fraunhofer HHI VVdeC through 3.2.1 contains a heap out-of-bounds read vulnerability that allows attackers to crash the decoder by supplying a collocated picture of different resolution. Attackers can craft a VVC bitstream enabling TMVP with a smaller collocated reference picture, causing getColInfo to read past the colMotion allocation when error concealment is enabled.","summary":"VVdeC, Fraunhofer's VVC video decoder, reads past a heap buffer when a crafted bitstream uses a smaller collocated reference picture with error concealment enabled. An attacker can crash the decoder by supplying such a video stream.","severity":"medium","cvss":5.7,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["package","video-decoding","vvc","vvdec"],"not_affected_if":["trusted-input-only","vvdec-not-used"],"how_to_check":"- Check the installed VVdeC version against the range through 3.2.1 in the sources.\n- Check whether error concealment is enabled in the decoder configuration: unknown if the sources do not say how to set it.","fix":null,"status":"open","published_at":"2026-11-07T15:17:15+00:00","first_seen_at":"2026-11-07T15:47:57+00:00","triaged_at":"2026-11-07T15:48:18+00:00","updated_at":"2026-11-07T15:48:18+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-07T15:48:18Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"unknown","title":"VVdeC: crafted VVC bitstream makes the decoder read out of bounds","impact":"low","summary":"VVdeC, Fraunhofer's VVC video decoder, reads past a heap buffer when a crafted bitstream uses a smaller collocated reference picture with error concealment enabled. An attacker can crash the decoder by supplying such a video stream.","audience":"developers","category":"package","nicknames":[],"who_cares":["vvdec","video-decoding","vvc"],"confidence":0.6,"fix_status":"unknown","needs_auth":"no","worst_case":"decoder process crashes on attacker-supplied video stream","analyst_note":"Confirm the fixed version and the error-concealment default from the linked patch at github.com before publishing a fix.","how_to_check":"- Check the installed VVdeC version against the range through 3.2.1 in the sources.\n- Check whether error concealment is enabled in the decoder configuration: unknown if the sources do not say how to set it.","plain_action":"","needs_analyst":true,"not_affected_if":["trusted-input-only","vvdec-not-used"],"who_is_affected":"Applications that decode untrusted VVC streams with the VVdeC library, where error concealment is enabled, are exposed to a crash. Systems that decode only trusted content or do not use VVdeC can skip it. The sources do not give more detail on the affected configuration.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000697,"input_tokens":4306,"output_tokens":532,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-124312':14A,17A '-2026':13A,16A '3.2.1':65C 'alloc':111C 'allow':76C 'attack':50B,77C,90C 'bitstream':4A,38B,95C 'bound':11A,72C 'buffer':34B 'caus':104C 'colloc':42B,85C,101C 'colmot':110C 'conceal':47B,114C 'contain':66C 'craft':2A,37B,92C 'crash':52B,79C 'cve':12A,15A 'decod':7A,21B,29B,54B,81C 'differ':88C 'enabl':48B,96C,116C 'error':46B,113C 'fraunhof':25B,61C 'getcolinfo':105C 'heap':33B,68C 'hhi':62C 'make':5A 'out-of-bound':69C 'packag':18B 'past':31B,108C 'pictur':44B,86C,103C 'read':8A,30B,73C,107C 'refer':43B,102C 'resolut':89C 'smaller':41B,100C 'stream':60B 'suppli':56B,83C 'tmvp':97C 'use':39B 'video':20B,28B,59B 'video-decod':19B 'vulner':74C 'vvc':3A,22B,27B,94C 'vvdec':1A,23B,24B,63C","nicknames":[],"mitigations":[],"who_affected":"Applications that decode untrusted VVC streams with the VVdeC library, where error concealment is enabled, are exposed to a crash. Systems that decode only trusted content or do not use VVdeC can skip it. The sources do not give more detail on the affected configuration.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"developers","plain_action":null,"pkeys":[],"ptokens":[],"labels":["medium","package","videodecoding","vvc","vvdec"],"campaign_type":null,"search_a":"'-124312':14A,17A '-2026':13A,16A 'bitstream':4A 'bound':11A 'craft':2A 'cve':12A,15A 'decod':7A 'make':5A 'read':8A 'vvc':3A 'vvdec':1A","search_b":"'attack':50B 'bitstream':38B 'buffer':34B 'colloc':42B 'conceal':47B 'craft':37B 'crash':52B 'decod':21B,29B,54B 'enabl':48B 'error':46B 'fraunhof':25B 'heap':33B 'packag':18B 'past':31B 'pictur':44B 'read':30B 'refer':43B 'smaller':41B 'stream':60B 'suppli':56B 'use':39B 'video':20B,28B,59B 'video-decod':19B 'vvc':22B,27B 'vvdec':23B,24B","search_c":"'3.2.1':65C 'alloc':111C 'allow':76C 'attack':77C,90C 'bitstream':95C 'bound':72C 'caus':104C 'colloc':85C,101C 'colmot':110C 'conceal':114C 'contain':66C 'craft':92C 'crash':79C 'decod':81C 'differ':88C 'enabl':96C,116C 'error':113C 'fraunhof':61C 'getcolinfo':105C 'heap':68C 'hhi':62C 'out-of-bound':69C 'past':108C 'pictur':86C,103C 'read':73C,107C 'refer':102C 'resolut':89C 'smaller':100C 'suppli':83C 'tmvp':97C 'vulner':74C 'vvc':94C 'vvdec':63C","first_public_at":"2026-11-07T15:17:15+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/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":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-124312","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124312","severity":null,"published_at":"2026-11-07T15:17:15+00:00","modified_at":"2026-11-07T15:17:15+00:00","first_seen_at":"2026-11-07T15:47:57+00:00","fetched_at":"2026-11-07T15:47:57+00:00","note":null}],"documents":[{"id":96366,"url":"https://github.com/fraunhoferhhi/vvdec/commit/0695c06221c27b3680fec9851ac2cf46b2195ea9","title":"Patch: github.com","kind":"other","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"},{"id":96367,"url":"https://www.vulncheck.com/advisories/fraunhofer-hhi-vvdec-through-3.2.1-heap-out-of-bounds-read-via-codingstructure-getcolinfo","title":"Third-party advisory: www.vulncheck.com","kind":"advisory","source":"nvd","publisher":"research","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":"Third-party advisory: www.vulncheck.com"}],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}