Allocation of Resources Without Limits or Throttling in gst-plugins-good and gstreamer - CVE-2026-18649

Vulnerability identifier: #VU141136

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-18649

CWE-ID: CWE-770

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper resource management in the rtph264depay and rtph265depay RTP depayload elements when processing fragmented NAL units during reassembly. A remote attacker can send a stream of syntactically valid FU-A fragments that never complete reassembly to cause a denial of service.

The issue does not require malformed packets or high packet rates.

gst-plugins-good
gstreamer
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Ubuntu
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
gst-plugins-good1.0 (Ubuntu package)
gstreamer1-plugins-good (Red Hat package)

Install security update from vendor's website.

gst-plugins-good - update to 1.28.6
gstreamer - update to 1.28.6
gst-plugins-good1.0 (Ubuntu package) - addressed in versions 1.8.3-1ubuntu0.5+esm2, 1.14.5-0ubuntu1~18.04.3+esm2, 1.16.3-0ubuntu1.3+esm2, 1.20.3-0ubuntu1.8, 1.24.2-1ubuntu1.6, 1.28.2-2ubuntu0.2
gstreamer1-plugins-good (Red Hat package) - addressed in versions 1.18.4-8.el9_2.2, 1.22.1-4.el9_4.2, 1.22.12-5.el9_6.2, 1.22.12-7.el9_8.2

• https://gstreamer.freedesktop.org/security/sa-2026-0076.html
• https://gstreamer.freedesktop.org

• Multiple vulnerabilities in GStreamer
• Red Hat Enterprise Linux 9 update for gstreamer1-plugins-good
• Red Hat Enterprise Linux 9 update for gstreamer1-plugins-good
• Red Hat Enterprise Linux 9 update for gstreamer1-plugins-good
• Red Hat Enterprise Linux 9 update for gstreamer1-plugins-good
• Ubuntu update for gst-plugins-good1.0