CVE-2026-12891
Publication date 23 June 2026
Last updated 26 June 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| gst-plugins-bad1.0 | 26.04 LTS resolute |
Needs evaluation
|
| 25.10 questing |
Needs evaluation
|
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 14.04 LTS trusty |
Needs evaluation
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
4.3 · Medium
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-12891
- https://bugzilla.redhat.com/show_bug.cgi?id=2491318
- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5109 (private)
- https://access.redhat.com/security/cve/CVE-2026-12891
- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5109