CVE-2026-121611
Published:November 09, 2026
Updated:November 10, 2026
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.
Affected Packages
https://github.com/GStreamer/gstreamer.git (GITHUB):
Affected version(s) >=gst-plugins-bad-1.15.1 <1.28.9 || >=1.19.3 <1.28.9 || >=1.21.1 <1.28.9 || >=1.23.1 <1.28.9 || >=1.25.1 <1.28.9 || >=1.27.1 <1.28.9Fix Suggestion:
Update to version 1.28.9Related Resources (5)
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Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Use of Uninitialized Variable