CVE-2026-12892

A flaw was found in GStreamer's gst-plugins-bad package. When processing a specially crafted H.264 video file containing malformed MVC or SVC extension slice NAL units, a 1-byte heap out-of-bounds read can occur during parsing. This happens when the parser attempts to check slice boundary information without first verifying that the NAL unit contains enough data beyond the extension header. An attacker could exploit this by tricking a user into opening a malicious H.264 video file, potentially causing the application to crash or leak a single byte of heap memory.

CVSS v3 4.4 MEDIUM

4.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 2.5

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-12892
https://bugzilla.redhat.com/show_bug.cgi?id=2491321
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5108

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-2026-12892

Mitre link : CVE-2026-12892

CVE.ORG link : CVE-2026-12892

JSON object : View

Products Affected

No product.

CWE

CWE-125

Out-of-bounds Read

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