{"id":"CVE-2026-125188","kind":"vulnerability","aliases":["CVE-2026-125188"],"related":[],"title":"FFmpeg: odd-height interlaced ProRes encoding leaks heap memory into output","description":"FFmpeg through 9.0.2 contains a heap out-of-bounds read vulnerability in libavcodec/proresenc_anatoliy.c that occurs when the prores_aw encoder processes interlaced, odd-height frames. Attackers can supply odd-height video that causes subimage_with_fill_template() to fill padding rows from memory before the fill_y buffer, leaking heap contents into the encoded output.","summary":"FFmpeg's prores_aw encoder reads memory before a heap buffer when it processes interlaced frames with odd heights. The encoded output can contain leaked heap contents.","severity":"low","cvss":2.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["ffmpeg","media-processing","package","prores"],"not_affected_if":["no-prores-encoding","trusted-input-only"],"how_to_check":"- `ffmpeg -version` to see the installed FFmpeg version, which the sources say is affected through `9.0.2`\n- Check whether the build includes the prores_aw encoder (`ffmpeg -encoders | grep prores_aw`)","fix":null,"status":"open","published_at":"2026-11-09T19:16:54+00:00","first_seen_at":"2026-11-09T19:28:17+00:00","triaged_at":"2026-11-09T19:33:44+00:00","updated_at":"2026-11-09T19:33:44+00:00","category":"package","confidence":0.5,"triage":{"at":"2026-11-09T19:33:44Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"unknown","title":"FFmpeg: odd-height interlaced ProRes encoding leaks heap memory into output","impact":"low","summary":"FFmpeg's prores_aw encoder reads memory before a heap buffer when it processes interlaced frames with odd heights. The encoded output can contain leaked heap contents.","audience":"developers","category":"package","nicknames":[],"who_cares":["ffmpeg","media-processing","prores"],"confidence":0.5,"fix_status":"unknown","needs_auth":"unknown","worst_case":"encoded output leaks heap memory contents from the process","analyst_note":"Confirm the fixed FFmpeg version and whether the linked patch commits are in a release; the sources give no fixed version.","how_to_check":"- `ffmpeg -version` to see the installed FFmpeg version, which the sources say is affected through `9.0.2`\n- Check whether the build includes the prores_aw encoder (`ffmpeg -encoders | grep prores_aw`)","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-prores-encoding","trusted-input-only"],"who_is_affected":"Systems that run FFmpeg to encode ProRes video from untrusted input, such as media processing pipelines that accept user uploads. Exposure depends on the prores_aw encoder being used on interlaced, odd-height frames. Teams that only decode or never encode ProRes can likely skip it.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"yes","severity_if_unknown":"low"},"cost_usd":0.000737,"input_tokens":4657,"output_tokens":542,"severity_before":"low"},"analyst_status":null,"analyst_note":null,"search":"'-125188':15A,18A '-2026':14A,17A '9.0.2':54C 'attack':79C 'aw':28B,71C 'bound':61C 'buffer':35B,102C 'caus':87C 'contain':48B,55C 'content':51B,105C 'cve':13A,16A 'encod':7A,29B,45B,72C,108C 'ffmpeg':1A,19B,25B,52C 'fill':90C,93C,100C 'frame':40B,78C 'heap':9A,34B,50B,57C,104C 'height':4A,43B,77C,84C 'interlac':5A,39B,74C 'leak':8A,49B,103C 'libavcodec/proresenc_anatoliy.c':65C 'media':21B 'media-process':20B 'memori':10A,31B,97C 'occur':67C 'odd':3A,42B,76C,83C 'odd-height':2A,75C,82C 'out-of-bound':58C 'output':12A,46B,109C 'packag':23B 'pad':94C 'process':22B,38B,73C 'prore':6A,24B,27B,70C 'read':30B,62C 'row':95C 'subimag':88C 'suppli':81C 'templat':91C 'video':85C 'vulner':63C 'y':101C","nicknames":[],"mitigations":[],"who_affected":"Systems that run FFmpeg to encode ProRes video from untrusted input, such as media processing pipelines that accept user uploads. Exposure depends on the prores_aw encoder being used on interlaced, odd-height frames. Teams that only decode or never encode ProRes can likely skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"developers","plain_action":null,"pkeys":[],"ptokens":[],"labels":["ffmpeg","low","mediaprocessing","package","prores"],"campaign_type":null,"search_a":"'-125188':15A,18A '-2026':14A,17A 'cve':13A,16A 'encod':7A 'ffmpeg':1A 'heap':9A 'height':4A 'interlac':5A 'leak':8A 'memori':10A 'odd':3A 'odd-height':2A 'output':12A 'prore':6A","search_b":"'aw':28B 'buffer':35B 'contain':48B 'content':51B 'encod':29B,45B 'ffmpeg':19B,25B 'frame':40B 'heap':34B,50B 'height':43B 'interlac':39B 'leak':49B 'media':21B 'media-process':20B 'memori':31B 'odd':42B 'output':46B 'packag':23B 'process':22B,38B 'prore':24B,27B 'read':30B","search_c":"'9.0.2':54C 'attack':79C 'aw':71C 'bound':61C 'buffer':102C 'caus':87C 'contain':55C 'content':105C 'encod':72C,108C 'ffmpeg':52C 'fill':90C,93C,100C 'frame':78C 'heap':57C,104C 'height':77C,84C 'interlac':74C 'leak':103C 'libavcodec/proresenc_anatoliy.c':65C 'memori':97C 'occur':67C 'odd':76C,83C 'odd-height':75C,82C 'out-of-bound':58C 'output':109C 'pad':94C 'process':73C 'prore':70C 'read':62C 'row':95C 'subimag':88C 'suppli':81C 'templat':91C 'video':85C 'vulner':63C 'y':101C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-09T19:16:54+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/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-2026-125188","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-125188","severity":null,"published_at":"2026-11-09T19:16:54+00:00","modified_at":"2026-11-09T19:16:54+00:00","first_seen_at":"2026-11-09T19:28:17+00:00","fetched_at":"2026-11-09T19:28:17+00:00","note":null}],"documents":[{"id":109266,"url":"https://github.com/FFmpeg/FFmpeg/commit/ad2287d6d2511af66222e8f7e40d546bc8d461ec","title":"Patch: github.com","kind":"other","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"},{"id":109267,"url":"https://github.com/FFmpeg/FFmpeg/commit/d74f5e0559ba09d942c47687856349b03c1115dd","title":"Patch: github.com","kind":"other","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"},{"id":109268,"url":"https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-prores-prores-aw-heap-out-of-bounds-read-in-interlaced-encoding","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"}