{"id":"CVE-2026-119728","kind":"vulnerability","aliases":["CVE-2026-119728"],"related":[],"title":"GStreamer bad plugins: malformed H.264 file crashes video parser via NULL pointer","description":"A flaw was found in the H.264 video parser in gst-plugins-bad. When processing a specially crafted H.264 video file with malformed Multiview (MVC) Sequence Parameter Set data, the parser can dereference a NULL pointer during the cleanup of partially allocated internal structures after a parse failure. This can cause the application using GStreamer to crash, resulting in a denial of service.","summary":"A malformed H.264 video file with bad Multiview Coding parameter data makes the gst-plugins-bad H.264 parser dereference a NULL pointer during cleanup after a parse failure. An attacker who supplies such a file can crash the application using GStreamer, a denial of service.","severity":"medium","cvss":5.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["gst-plugins-bad","gstreamer","h264","media-pipelines","package"],"not_affected_if":["gstreamer-not-used","no-untrusted-video"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-10-30T19:18:21+00:00","first_seen_at":"2026-10-30T19:25:29+00:00","triaged_at":"2026-10-30T19:26:31+00:00","updated_at":"2026-10-30T19:26:31+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-30T19:26:31Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"unknown","title":"GStreamer bad plugins: malformed H.264 file crashes video parser via NULL pointer","impact":"low","summary":"A malformed H.264 video file with bad Multiview Coding parameter data makes the gst-plugins-bad H.264 parser dereference a NULL pointer during cleanup after a parse failure. An attacker who supplies such a file can crash the application using GStreamer, a denial of service.","audience":"developers","category":"package","nicknames":[],"who_cares":["gstreamer","gst-plugins-bad","h264","media-pipelines"],"confidence":0.6,"fix_status":"unknown","needs_auth":"no","worst_case":"application using GStreamer crashes, denial of service","analyst_note":"Find the affected and fixed gst-plugins-bad versions in the NVD entry or the upstream GStreamer advisory, and confirm whether file input alone triggers it.","how_to_check":"- Check whether the application links the gst-plugins-bad H.264 parser, for example with `gst-inspect-1.0 h264parse` on the host\n- unknown for anything else: the sources do not name affected versions","plain_action":"","needs_analyst":true,"not_affected_if":["no-untrusted-video","gstreamer-not-used"],"who_is_affected":"Applications that use GStreamer with the gst-plugins-bad package to parse H.264 video, especially ones that accept video files or streams from untrusted sources. The sources do not list affected versions or a fixed release. Teams that only process trusted media or do not use GStreamer can skip it.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000708,"input_tokens":4142,"output_tokens":588,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-119728':15A,18A '-2026':14A,17A 'alloc':117C 'applic':68B,128C 'attack':59B 'bad':2A,22B,35B,45B,88C 'caus':126C 'cleanup':53B,114C 'code':37B 'craft':93C 'crash':7A,66B,132C 'cve':13A,16A 'data':39B,104C 'denial':72B,136C 'derefer':48B,108C 'failur':57B,123C 'file':6A,33B,64B,96C 'flaw':76C 'found':78C 'gst':20B,43B,86C 'gst-plugins-bad':19B,42B,85C 'gstreamer':1A,23B,70B,130C 'h.264':5A,31B,46B,81C,94C 'h264':24B 'intern':118C 'make':40B 'malform':4A,30B,98C 'media':26B 'media-pipelin':25B 'multiview':36B,99C 'mvc':100C 'null':11A,50B,110C 'packag':28B 'paramet':38B,102C 'pars':56B,122C 'parser':9A,47B,83C,106C 'partial':116C 'pipelin':27B 'plugin':3A,21B,44B,87C 'pointer':12A,51B,111C 'process':90C 'result':133C 'sequenc':101C 'servic':74B,138C 'set':103C 'special':92C 'structur':119C 'suppli':61B 'use':69B,129C 'via':10A 'video':8A,32B,82C,95C","nicknames":[],"mitigations":[],"who_affected":"Applications that use GStreamer with the gst-plugins-bad package to parse H.264 video, especially ones that accept video files or streams from untrusted sources. The sources do not list affected versions or a fixed release. Teams that only process trusted media or do not use GStreamer can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"developers","plain_action":null,"first_public_at":"2026-10-30T19:18:21+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cvss_by":"secalert@redhat.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-119728","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119728","severity":null,"published_at":"2026-10-30T19:18:21+00:00","modified_at":"2026-10-30T19:18:21+00:00","first_seen_at":"2026-10-30T19:25:29+00:00","fetched_at":"2026-10-30T19:25:29+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}