| Name | CVE-2026-12891 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| gst-plugins-bad1.0 (PTS) | bullseye | 1.18.4-3+deb11u4 | vulnerable |
| bullseye (security) | 1.18.4-3+deb11u6 | vulnerable | |
| bookworm, bookworm (security) | 1.22.0-4+deb12u7 | vulnerable | |
| trixie (security), trixie | 1.26.2-3+deb13u2 | vulnerable | |
| forky, sid | 1.28.4-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| gst-plugins-bad1.0 | source | (unstable) | (unfixed) |
[trixie] - gst-plugins-bad1.0 <no-dsa> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=2491318
https://gstreamer.freedesktop.org/security/sa-2026-0048.html
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5109 (private)
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/eec42c2fedda888085d3356b3a5af1ada86f5746 (1.29.2)
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/89313b6ddd69f7495e61adfaa5137e430668d660 (1.28 branch)
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/dbf50dce3154ec4aa9d3858110761f3479a0f002 (1.26 branch)