Gst-plugins-good: assertion failures in FLV demuxer when parsing malformed enhanced audio/video tags

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-119843
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-03 10:17:16 UTC
Updated2026-11-03 14:17:35 UTC
DescriptionA flaw was found in GStreamer's gst-plugins-good package. The FLV media demuxer does not properly validate buffer sizes and data availability when processing enhanced audio and video tags in malformed or truncated FLV streams. A remote attacker could exploit this vulnerability by providing a specially crafted FLV media file that, when opened or streamed by a GStreamer-based application, triggers an assertion failure or a process crash, leading to denial of service.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Problem Types: CWE-617 | CWE-617 Reachable Assertion

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
3.1CNACVSS6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat Enterprise Linux 10 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 8 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 9 Not specified Not specified
CNA GStreamer Project Gst-plugins-good affected 1.28.2 semver Not specified
CNA GStreamer Project Gst-plugins-good unaffected 1.28.2 Not specified

References

ReferenceSourceLinkTags
access.redhat.com/security/cve/CVE-2026-119843 [email protected] access.redhat.com
gstreamer.freedesktop.org/security/sa-2026-0020.html [email protected] gstreamer.freedesktop.org
bugzilla.redhat.com/show_bug.cgi [email protected] bugzilla.redhat.com
gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/11244.patch [email protected] gitlab.freedesktop.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
CNA2026-04-07T00:00:00.000ZReported to Red Hat.
CNA2026-04-07T00:00:00.000ZMade public.

Workarounds

CNA: No mitigation is currently available that meets Red Hat Product Security's standards for usability, deployment, applicability, or stability.

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