CVE-2026-121611: Gst plugins bad1.0 · A flaw was found in GStreamer's gst-plugins-bad package
Affects gst-plugins-bad1.0Source GCVE Database
Not known to be exploited · CVSS 6.5 Medium.
Data as of 13 Nov 2026, 22:04 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 6.5 |
|---|
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 9 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10gst-plugins-bad1.0pkg:deb/ubuntu/gst-plugins-bad1.0?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSgst-plugins-bad1.0pkg:deb/ubuntu/gst-plugins-bad1.0?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu Pro 24.04 LTSgst-plugins-bad1.0pkg:deb/ubuntu/gst-plugins-bad1.0?arch=source&distro=esm-apps/nobleOther threats | Affected
| Fixed in– |
Ubuntu Pro 22.04 LTSgst-plugins-bad1.0pkg:deb/ubuntu/gst-plugins-bad1.0?arch=source&distro=esm-apps/jammyOther threats | Affected
| Fixed in– |
Ubuntu Pro 20.04 LTSgst-plugins-bad1.0pkg:deb/ubuntu/gst-plugins-bad1.0?arch=source&distro=esm-apps/focalOther threats | Affected
| Fixed in– |
Ubuntu Pro 18.04 LTSgst-plugins-bad1.0pkg:deb/ubuntu/gst-plugins-bad1.0?arch=source&distro=esm-apps/bionicOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
A flaw was found in GStreamer's gst-plugins-bad package. A use of uninitialized memory vulnerability exists in the H.265 (HEVC) bitstream parser when processing Video Parameter Sets that declare more than one HRD (Hypothetical Reference Decoder) parameter set. A remote attacker could exploit this by providing a crafted H.265 media file or stream that, when processed by an application using GStreamer, causes unpredictable parser behavior and may crash the application. This can lead to a denial of service for any application using GStreamer to play back H.265 content.
References
- ubuntu.com/security/CVE-2026-121611 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-121611 (opens in a new tab)
- gstreamer.freedesktop.org/security/sa-2026-0094.html (opens in a new tab)
- gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/12988 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-121611 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2565937 (opens in a new tab)
- gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5332 (opens in a new tab)