CVE-2026-12891

Gstreamer1-plugins-bad-free: gstreamer1-plugins-bad: global buffer overflow (oob read) in h.266/vvc vui parameter parser

Published Jun 23, 2026 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Description
A flaw was found in the GStreamer gst-plugins-bad package. When processing a malformed H.266/VVC video stream with a crafted aspect ratio indicator value, the H.266 parser performs an out-of-bounds read of up to 8 bytes from adjacent memory. This flaw allows an attacker to craft a malicious H.266 video file or stream that, when processed by a GStreamer-based application, could leak limited memory contents through video metadata, potentially exposing sensitive information from the application's address space.

Remediation

Vendor Workaround

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

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-6458-1 gst-plugins-bad1.0 security update
History
Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
cpe:/a:redhat:enterprise_linux:10
cpe:/a:redhat:enterprise_linux:8
cpe:/a:redhat:enterprise_linux:9
Type Values Removed Values Added
Title Gstreamer1-plugins-bad: gstreamer1-plugins-bad: global buffer overflow (oob read) in h.266/vvc vui parameter parser Gstreamer1-plugins-bad-free: gstreamer1-plugins-bad: global buffer overflow (oob read) in h.266/vvc vui parameter parser
Type Values Removed Values Added
First Time appeared Gstreamer Project
Gstreamer Project gstreamer Plugin
Vendors & Products Gstreamer Project
Gstreamer Project gstreamer Plugin
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A flaw was found in the GStreamer gst-plugins-bad package. When processing a malformed H.266/VVC video stream with a crafted aspect ratio indicator value, the H.266 parser performs an out-of-bounds read of up to 8 bytes from adjacent memory. This flaw allows an attacker to craft a malicious H.266 video file or stream that, when processed by a GStreamer-based application, could leak limited memory contents through video metadata, potentially exposing sensitive information from the application's address space.
Title Gstreamer1-plugins-bad: gstreamer1-plugins-bad: global buffer overflow (oob read) in h.266/vvc vui parameter parser
First Time appeared Redhat
Redhat enterprise Linux
Weaknesses CWE-125
CPEs cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Nov 5, 2026, 5:03 PM
Reserved
Jun 22, 2026, 11:31 AM
Status
Analyzed
Published
Jun 23, 2026, 9:16 PM
Modified
Nov 5, 2026, 5:18 PM
Severity
Moderate
Public date
Jun 23, 2026, 12:00 AM