CVE-2026-12891

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.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-12891
https://bugzilla.redhat.com/show_bug.cgi?id=2491318
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5109

Configurations

No configuration.

History

23 Jun 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-23 21:16

Updated : 2026-06-24 14:17

NVD link : CVE-2026-12891

Mitre link : CVE-2026-12891

CVE.ORG link : CVE-2026-12891

JSON object : View

Products Affected

No product.

CWE

CWE-125

Out-of-bounds Read

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