GSTREAMER · CVE-2026-125704 · Runtime
FIX → 1.28.3 ✓ verified
GStreamer's core buffer value deserialization frees a mapped buffer before unmapping it when serialized data contains an invalid character. An application parsing untrusted caps or structure data can crash, and a network-facing GStreamer Data Protocol receiver can be triggered without user interaction.
first public Nov 10, 2026 · 2 sources
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Applications using GStreamer core below 1.28.3 that deserialize untrusted caps, structure or serialized buffer data are exposed; a network-facing GStreamer Data Protocol receiver can be hit without user interaction (per NVD). Pipelines that only process trusted local media can skip it. The upstream advisory says impact could range from a crash to data corruption or code execution; NVD says only a crash is established.
Not affected if local-media-only, no-untrusted-input
Who cares gstreamer, media-pipelines, network-receivers
gst-launch-1.0 --version or gst-inspect-1.0 --version (or pkg-config --modversion gstreamer-1.0); GStreamer core below 1.28.3 is affectedA use-after-free flaw was found in GStreamer core buffer value deserialization. When crafted serialized buffer data contains an invalid character, an error path frees a mapped buffer before unmapping it. An application that parses untrusted caps or structure data could crash; a network-facing GStreamer Data Protocol receiver can process such data without user interaction. Further impact has not been established.
This page as .md · .json · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.
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Upgrade to 1.28.3
Upgrade GStreamer core to 1.28.3 or later (1.28.9 is the current 1.28 stable); older versions: apply the upstream patch and recompile.