{"id":"CVE-2026-119842","kind":"vulnerability","aliases":["CVE-2026-119842"],"related":[],"title":"GStreamer: malformed MicroDVD subtitle file crashes media playback","description":"A flaw was found in GStreamer's gst-plugins-base MicroDVD subtitle parser. When processing a specially crafted subtitle file, the parser may dereference a NULL pointer, causing the application to crash when a user opens or plays media with a malformed MicroDVD (.sub) subtitle file.","summary":"GStreamer's gst-plugins-base MicroDVD subtitle parser can dereference a NULL pointer when it reads a crafted .sub file. The result is a crash of the application that opens or plays the media.","severity":"medium","cvss":6.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["gstreamer","linux","media-playback","runtime"],"not_affected_if":["no-user-subtitles","trusted-media-only"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-10-30T19:18:22+00:00","first_seen_at":"2026-10-30T19:25:29+00:00","triaged_at":"2026-10-30T19:26:18+00:00","updated_at":"2026-10-30T19:26:18+00:00","category":"runtime","confidence":0.5,"triage":{"at":"2026-10-30T19:26:18Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"GStreamer: malformed MicroDVD subtitle file crashes media playback","impact":"low","summary":"GStreamer's gst-plugins-base MicroDVD subtitle parser can dereference a NULL pointer when it reads a crafted .sub file. The result is a crash of the application that opens or plays the media.","audience":"businesses","category":"runtime","nicknames":[],"who_cares":["gstreamer","media-playback","linux"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"Application crashes when a malformed subtitle file is opened","analyst_note":"Confirm the affected and fixed gst-plugins-base versions from the NVD entry or upstream GStreamer advisory; sources give none.","how_to_check":"- Check the installed GStreamer version with `gst-inspect-1.0 --version`\n- Check whether the `subparse` plugin from gst-plugins-base is in use by your media pipeline\n- unknown for a fixed version: the sources do not say","plain_action":"","needs_analyst":true,"not_affected_if":["no-user-subtitles","trusted-media-only"],"who_is_affected":"Applications that use GStreamer to decode or play media and accept user-supplied MicroDVD (.sub) subtitle files are exposed to a crash. Systems that never parse subtitle files, or that only play trusted media, are unlikely to be reached. The sources do not describe a data-exfiltration path.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.00069,"input_tokens":4123,"output_tokens":556,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-119842':11A,14A '-2026':10A,13A 'applic':49B,86C 'base':26B,66C 'caus':84C 'craft':39B,74C 'crash':6A,46B,88C 'cve':9A,12A 'derefer':31B,80C 'file':5A,41B,76C,102C 'flaw':57C 'found':59C 'gst':24B,64C 'gst-plugins-bas':23B,63C 'gstreamer':1A,15B,21B,61C 'linux':16B 'malform':2A,98C 'may':79C 'media':7A,18B,55B,95C 'media-playback':17B 'microdvd':3A,27B,67C,99C 'null':33B,82C 'open':51B,92C 'parser':29B,69C,78C 'play':53B,94C 'playback':8A,19B 'plugin':25B,65C 'pointer':34B,83C 'process':71C 'read':37B 'result':43B 'runtim':20B 'special':73C 'sub':40B,100C 'subtitl':4A,28B,68C,75C,101C 'user':91C","nicknames":[],"mitigations":[],"who_affected":"Applications that use GStreamer to decode or play media and accept user-supplied MicroDVD (.sub) subtitle files are exposed to a crash. Systems that never parse subtitle files, or that only play trusted media, are unlikely to be reached. The sources do not describe a data-exfiltration path.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"first_public_at":"2026-10-30T19:18:22+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/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-2026-119842","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119842","severity":null,"published_at":"2026-10-30T19:18:22+00:00","modified_at":"2026-10-30T19:18:22+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"}