CVE-2026-12891
MEDIUM EPSS 17.8%
Published Jun 23, 20261w ago · Modified Jun 24, 20261w ago
4.3 CVSS 3.1
Published Jun 23, 2026 1w ago
Last Modified Jun 24, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Low
Integrity None
Availability None
Threat Intelligence
EPSS Exploit Probability
17.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-125 Out-of-bounds Read Memory Safety
References 3
- access.redhat.com https://access.redhat.com/security/cve/CVE-2026-12891
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2491318
- gitlab.freedesktop.org https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5109
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.