Skip to content
Fencer Intel
medium 6.5

CVE-2026-121611 json

Gstreamer1-plugins-bad-free: gst-plugins-bad: use of uninitialized gsth265hrdparams in gst_h265_parse_vps() multi-hrd workaround loop

published 2d ago modified yesterday also EUVD-2026-120052

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

Summary

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.

Patch / fix

  • gst-plugins-bad1.0 Debian 14 1.28.9-1

debian advisories DEBIAN-CVE-2026-121611

Is CVE-2026-121611 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-121611 updated cvss 6.5

gstreamer1-plugins-bad-free: gst-plugins-bad: use of uninitialized GstH265HRDParams in gst_h265_parse_vps() multi-HRD workaround loop

  • Red Hat Enterprise Linux 8 gstreamer1-plugins-bad-free Red Hat Enterprise Linux 9 gstreamer1-plugins-bad-free, gstreamer1-plugins-bad-free-libs Red Hat Enterprise Linux 10 gstreamer1-plugins-bad-free
    affected: workaround, no fix available “No mitigation is currently available that meets Red Hat Product Security's standards for usability, deployment, applicability, or stability.”
  • Red Hat Enterprise Linux 7 gstreamer1-plugins-bad-free, gstreamer1-plugins-bad-free-gtk
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
yesterday

Exploit prediction

0.56% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness
  • CWE-457 Use of Uninitialized Variable

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.