VULNERABILITY INTELLIGENCE

CVE-2026-12891

CVSS score4.3 MEDIUM
EPSS probability0.39%
CISA KEVNot currently listed
Published2026-06-23
Last modified2026-07-01
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

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.

Weakness classification

  • secalert@redhat.com: CWE-125

Primary references