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Vulnerability · Published Aug 6, 2026 · Assigned by redhat

CVE-2026-18649Gstreamer1-plugins-good: gst-plugins-good: unbounded memory growth in rtph264depay and rtph265depay rtp depayloaders

High 7.5

In plain English

A high-severity resource allocation without limits in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 62% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.0%top 38.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC

Official description

A flaw was found in the GStreamer gst-plugins-good package. The rtph264depay and rtph265depay RTP depayloader elements do not enforce a maximum size limit on the reassembly buffer used during fragmented RTP packet processing. A remote, unauthenticated attacker can send a continuous stream of RTP fragments without ever transmitting an end-of-fragment marker, causing the reassembly buffer to grow without bound until process memory is exhausted. This results in a denial of service through process termination.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10gstreamer1-plugins-good1.26.7-2.el10_2.3ALSA-2026:53451
AlmaLinux:8gstreamer1-plugins-good1.16.1-7.el8_10.3ALSA-2026:56966
AlmaLinux:9gstreamer1-plugins-good1.22.12-7.el9_8.2ALSA-2026:53452
AlmaLinux:10gstreamer1-plugins-good-gtk1.26.7-2.el10_2.3ALSA-2026:53451
AlmaLinux:8gstreamer1-plugins-good-gtk1.16.1-7.el8_10.3ALSA-2026:56966
AlmaLinux:9gstreamer1-plugins-good-gtk1.22.12-7.el9_8.2ALSA-2026:53452
Debian:12gst-plugins-good1.0no fix listedDEBIAN-CVE-2026-18649
Debian:13gst-plugins-good1.0no fix listedDEBIAN-CVE-2026-18649
Debian:14gst-plugins-good1.01.28.6-1DEBIAN-CVE-2026-18649
Rocky Linux:10gstreamer1-plugins-good0:1.26.7-2.el10_2.3RLSA-2026:53451
Rocky Linux:8gstreamer1-plugins-good0:1.16.1-7.el8_10.3RLSA-2026:56966
Rocky Linux:9gstreamer1-plugins-good0:1.22.12-7.el9_8.2RLSA-2026:53452
Ubuntu:22.04:LTSgst-plugins-good1.01.20.3-0ubuntu1.8USN-8778-1
Ubuntu:22.04:LTSgst-plugins-good1.01.20.3-0ubuntu1.8UBUNTU-CVE-2026-18649
Ubuntu:24.04:LTSgst-plugins-good1.01.24.2-1ubuntu1.6USN-8778-1
Ubuntu:24.04:LTSgst-plugins-good1.01.24.2-1ubuntu1.6UBUNTU-CVE-2026-18649
Ubuntu:26.04:LTSgst-plugins-good1.01.28.2-2ubuntu0.2UBUNTU-CVE-2026-18649
Ubuntu:26.04:LTSgst-plugins-good1.01.28.2-2ubuntu0.2USN-8778-1

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support see references

Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References