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.
https://gstreamer.freedesktop.org/security/sa-2026-0019.html
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/11238.patch
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-114326