High · CVSS 7.5CVE-2026-125704

Gstreamer: gstreamer: use-after-free in gstreamer core buffer value deserializationCVE-2026-125704

Answer in brief

CVE-2026-125704 records a High severity (CVSS 7.5) vulnerability in Gstreamer: gstreamer: use-after-free in gstreamer core buffer value deserialization. The current sources do not mark it as known exploited. The current feed maps Red Hat/gstreamer1 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 10, 2026Updated Nov 10, 2026Source checked Nov 10, 2026First seen by HOL Nov 10, 2026Material review Nov 10, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/gstreamer1 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Red Hat/gstreamer1generic	*	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Red Hat/gstreamer1.
Review the reported fix. Source-reported workaround: There is no complete mitigation for applications that continue to deserialize untrusted GStreamer caps or structure strings. Restrict access to network-facing GStreamer Data Protocol receivers to trusted peers, and avoid passing externally supplied strings to gst_caps_from_string() or gst_structure_from_string() until an update is available. These measures reduce exposure only where the application can control those input paths.

Evidence timeline and material changes

Published upstream
Nov 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Nov 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Nov 10, 2026

Sources and claim methodology

Upstream source description

A 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.

Quoted source text, attributed separately from HOL analysis.

Package

Affected range

Fixed version

Red Hat/gstreamer1generic

Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Red Hat/gstreamer1.

Review the reported fix. Source-reported workaround: There is no complete mitigation for applications that continue to deserialize untrusted GStreamer caps or structure strings. Restrict access to network-facing GStreamer Data Protocol receivers to trusted peers, and avoid passing externally supplied strings to gst_caps_from_string() or gst_structure_from_string() until an update is available. These measures reduce exposure only where the application can control those input paths.

Sources and claim methodology

Upstream source description

Quoted source text, attributed separately from HOL analysis.