PT-2026-51589 · Red Hat · Red Hat Enterprise Linux 10+2

Faruk Kazi + 1 · Published 2026-06-23 · Updated 2026-06-23 · CVE-2026-12891

NVD

CVSS v3.1

4.3

Medium

Base vector

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

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.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-12891

Affected Products

Red Hat Enterprise Linux 10

Red Hat Enterprise Linux 8

Red Hat Enterprise Linux 9

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-12891 · Security Note
• https://access.redhat.com/security/cve/CVE-2026-12891 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2491318 · Note
• https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5109 · Note