RHSA-2026:98600
Vulnerability from csaf_redhat - Published: 2026-11-11 11:34 - Updated: 2026-11-11 19:11Summary
Red Hat Security Advisory: gstreamer1-plugins-base security update
Severity
Important
Notes
Topic: An update for gstreamer1-plugins-base is now available for Red Hat Enterprise Linux 10.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: GStreamer is a streaming media framework based on graphs of filters which operate on media data. The gstreamer1-plugins-base packages contain a collection of well-maintained base plug-ins.
Security Fix(es):
* gstreamer1-plugins-base: gst-plugins-base: heap buffer overflow via unvalidated GstVideoMeta plane extents in gst_video_frame_map_id and video_meta_deserialize (CVE-2026-86476)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in gst-plugins-base. A heap buffer overflow can be triggered when processing video buffers whose attached GstVideoMeta metadata declares plane strides and offsets that exceed the actual backing memory allocation. The metadata is not range-checked during deserialization, and the video frame mapping code does not verify that the declared plane geometry fits within the buffer before allowing consumers to read or write video data. A local attacker who controls the sending side of a GStreamer inter-process IPC pipeline can deliver a crafted buffer carrying fabricated strides, causing the receiving process to read or write beyond heap boundaries. Successful exploitation can cause a denial of service or potentially allow code execution within the affected process.
8.4 (High)
Affected products
Fixed
25 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-0:1.26.7-4.el10_3.1.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-0:1.26.7-4.el10_3.1.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-0:1.26.7-4.el10_3.1.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-0:1.26.7-4.el10_3.1.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-0:1.26.7-4.el10_3.1.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-debuginfo-0:1.26.7-4.el10_3.1.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-debuginfo-0:1.26.7-4.el10_3.1.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-debuginfo-0:1.26.7-4.el10_3.1.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-debuginfo-0:1.26.7-4.el10_3.1.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-debugsource-0:1.26.7-4.el10_3.1.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-debugsource-0:1.26.7-4.el10_3.1.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-debugsource-0:1.26.7-4.el10_3.1.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-debugsource-0:1.26.7-4.el10_3.1.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-devel-0:1.26.7-4.el10_3.1.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-devel-0:1.26.7-4.el10_3.1.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-devel-0:1.26.7-4.el10_3.1.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-devel-0:1.26.7-4.el10_3.1.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-tools-0:1.26.7-4.el10_3.1.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-tools-0:1.26.7-4.el10_3.1.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-tools-0:1.26.7-4.el10_3.1.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-tools-0:1.26.7-4.el10_3.1.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-tools-debuginfo-0:1.26.7-4.el10_3.1.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-tools-debuginfo-0:1.26.7-4.el10_3.1.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-tools-debuginfo-0:1.26.7-4.el10_3.1.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.3.Z:gstreamer1-plugins-base-tools-debuginfo-0:1.26.7-4.el10_3.1.x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Important
References
9 references
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"text": "A flaw was found in gst-plugins-base. A heap buffer overflow can be triggered when processing video buffers whose attached GstVideoMeta metadata declares plane strides and offsets that exceed the actual backing memory allocation. The metadata is not range-checked during deserialization, and the video frame mapping code does not verify that the declared plane geometry fits within the buffer before allowing consumers to read or write video data. A local attacker who controls the sending side of a GStreamer inter-process IPC pipeline can deliver a crafted buffer carrying fabricated strides, causing the receiving process to read or write beyond heap boundaries. Successful exploitation can cause a denial of service or potentially allow code execution within the affected process.",
"title": "Vulnerability description"
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"text": "gstreamer1-plugins-base: gst-plugins-base: heap buffer overflow via unvalidated GstVideoMeta plane extents in gst_video_frame_map_id and video_meta_deserialize",
"title": "Vulnerability summary"
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"text": "Red Hat is evaluating product impact for gst-plugins-base (libgstvideo) across supported streams. Upstream has confirmed the issue is valid and expects a fix in GStreamer 1.28.8 (target approximately October 2026). Coordinated public disclosure date is pending confirmation from upstream. The practical cross-process attack path requires GStreamer 1.24 or later with the unixfd plugin (unixfdsink/unixfdsrc), which serializes GstVideoMeta over Unix domain sockets. Upstream states the unixfd plugin is not used by software packaged in Red Hat Enterprise Linux or major Linux distributions, and the affected elements are not engaged automatically, limiting real-world exposure. Earlier GStreamer versions lack the unixfd IPC path but may still be affected by the underlying libgstvideo validation gap for in-process use. Red Hat Enterprise Linux builds ship with standard compiler hardening (PIE, Full RELRO, stack protector, _FORTIFY_SOURCE), and ASLR is enabled by default. These controls increase the difficulty of reliable code execution beyond denial of service but do not prevent the heap out-of-bounds access itself. On platforms where GStreamer runs inside a sandbox (for example Flatpak without shared IPC namespace), cross-process unixfd communication may be restricted, reducing exposure to the untrusted-sender scenario.",
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{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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"date": "2026-11-11T11:34:16+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:98600"
},
{
"category": "workaround",
"details": "If inter-process video sharing via unixfd is not required, build or deploy GStreamer without the unixfd plugin (for example meson option -Dgst-plugins-bad:unixfd=disabled, or omit libgstunixfd.so from the GStreamer plugin directory). Upstream confirms this is the only practical mitigation for the cross-process attack path and notes the unixfd plugin is not currently used by Red Hat-packaged or major distribution software. Operational policy to avoid connecting receiver pipelines to Unix socket endpoints controlled by untrusted local processes provides equivalent protection without rebuilding. This does not address the underlying validation gap in libgstvideo when attacker-controlled GstVideoMeta is supplied in-process.",
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],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 8.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "gstreamer1-plugins-base: gst-plugins-base: heap buffer overflow via unvalidated GstVideoMeta plane extents in gst_video_frame_map_id and video_meta_deserialize"
}
]
}
Loading…
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.