{"id":"CVE-2026-125069","kind":"vulnerability","aliases":["CVE-2026-125069"],"related":[],"title":"FFmpeg: Motion Pixels decoder crashes on oversized packet, causing denial of service","description":"FFmpeg through 9.0.2 contains a NULL pointer dereference vulnerability in the Motion Pixels decoder because mp_decode_frame() ignores init_get_bits() failure. Attackers supplying a roughly 2^28-byte packet through the libavcodec API overflow the bit count, causing reads from a NULL buffer that crash the process.","summary":"FFmpeg's Motion Pixels decoder ignores a bit-reader setup failure, so an oversized packet passed through the libavcodec API leads to a NULL buffer read. An attacker gets a process crash, which is a denial of service.","severity":"medium","cvss":5.7,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["ffmpeg","libavcodec","media-processing","package"],"not_affected_if":["codec-unused","trusted-input-only"],"how_to_check":"- Check the installed FFmpeg version with `ffmpeg -version`, or the libavcodec version your application links against.\n- Look for applications that decode untrusted input with the Motion Pixels (MP) codec through libavcodec.","fix":null,"status":"open","published_at":"2026-11-09T19:16:49+00:00","first_seen_at":"2026-11-09T19:28:15+00:00","triaged_at":"2026-11-09T19:32:09+00:00","updated_at":"2026-11-09T19:32:09+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-09T19:32:09Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"unknown","title":"FFmpeg: Motion Pixels decoder crashes on oversized packet, causing denial of service","impact":"low","summary":"FFmpeg's Motion Pixels decoder ignores a bit-reader setup failure, so an oversized packet passed through the libavcodec API leads to a NULL buffer read. An attacker gets a process crash, which is a denial of service.","audience":"businesses","category":"package","nicknames":[],"who_cares":["ffmpeg","libavcodec","media-processing"],"confidence":0.6,"fix_status":"unknown","needs_auth":"no","worst_case":"Process crashes after a crafted packet, causing denial of service.","analyst_note":"Confirm the first fixed FFmpeg version and whether the bug is reachable through common tools, by checking the linked patch on github.com and the vulncheck advisory.","how_to_check":"- Check the installed FFmpeg version with `ffmpeg -version`, or the libavcodec version your application links against.\n- Look for applications that decode untrusted input with the Motion Pixels (MP) codec through libavcodec.","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["trusted-input-only","codec-unused"],"who_is_affected":"Systems that feed untrusted media through FFmpeg or libavcodec and decode Motion Pixels streams are exposed to a crash. Systems that only process trusted files or do not use this codec can likely skip it. The sources do not name a fixed version; the linked patch is the vendor's reference.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000749,"input_tokens":4615,"output_tokens":575,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-125069':15A,18A '-2026':14A,17A '2':91C '28':92C '9.0.2':66C 'api':45B,98C 'attack':53B,87C 'bit':33B,85C,101C 'bit-read':32B 'buffer':50B,108C 'byte':93C 'caus':9A,103C 'contain':67C 'count':102C 'crash':5A,57B,110C 'cve':13A,16A 'decod':4A,29B,77C,80C 'denial':10A,61B 'derefer':71C 'failur':36B,86C 'ffmpeg':1A,19B,25B,64C 'frame':81C 'get':54B,84C 'ignor':30B,82C 'init':83C 'lead':46B 'libavcodec':20B,44B,97C 'media':22B 'media-process':21B 'motion':2A,27B,75C 'mp':79C 'null':49B,69C,107C 'overflow':99C 'overs':7A,39B 'packag':24B 'packet':8A,40B,94C 'pass':41B 'pixel':3A,28B,76C 'pointer':70C 'process':23B,56B,112C 'read':51B,104C 'reader':34B 'rough':90C 'servic':12A,63B 'setup':35B 'suppli':88C 'vulner':72C","nicknames":[],"mitigations":[],"who_affected":"Systems that feed untrusted media through FFmpeg or libavcodec and decode Motion Pixels streams are exposed to a crash. Systems that only process trusted files or do not use this codec can likely skip it. The sources do not name a fixed version; the linked patch is the vendor's reference.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["ffmpeg","libavcodec","mediaprocessing","medium","package"],"campaign_type":null,"search_a":"'-125069':15A,18A '-2026':14A,17A 'caus':9A 'crash':5A 'cve':13A,16A 'decod':4A 'denial':10A 'ffmpeg':1A 'motion':2A 'overs':7A 'packet':8A 'pixel':3A 'servic':12A","search_b":"'api':45B 'attack':53B 'bit':33B 'bit-read':32B 'buffer':50B 'crash':57B 'decod':29B 'denial':61B 'failur':36B 'ffmpeg':19B,25B 'get':54B 'ignor':30B 'lead':46B 'libavcodec':20B,44B 'media':22B 'media-process':21B 'motion':27B 'null':49B 'overs':39B 'packag':24B 'packet':40B 'pass':41B 'pixel':28B 'process':23B,56B 'read':51B 'reader':34B 'servic':63B 'setup':35B","search_c":"'2':91C '28':92C '9.0.2':66C 'api':98C 'attack':87C 'bit':85C,101C 'buffer':108C 'byte':93C 'caus':103C 'contain':67C 'count':102C 'crash':110C 'decod':77C,80C 'derefer':71C 'failur':86C 'ffmpeg':64C 'frame':81C 'get':84C 'ignor':82C 'init':83C 'libavcodec':97C 'motion':75C 'mp':79C 'null':69C,107C 'overflow':99C 'packet':94C 'pixel':76C 'pointer':70C 'process':112C 'read':104C 'rough':90C 'suppli':88C 'vulner':72C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-09T19:16:49+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:H/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-2026-125069","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-125069","severity":null,"published_at":"2026-11-09T19:16:49+00:00","modified_at":"2026-11-09T19:16:49+00:00","first_seen_at":"2026-11-09T19:28:15+00:00","fetched_at":"2026-11-09T19:28:15+00:00","note":null}],"documents":[{"id":109197,"url":"https://github.com/FFmpeg/FFmpeg/commit/26b4c37526fe0ecf1095b45daac08050f25f7659","title":"Patch: github.com","kind":"other","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"},{"id":109198,"url":"https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-null-pointer-dereference-via-motion-pixels-decoder","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"}],"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"}