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

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-06 · updated 2026-09-23
Weakness: CWE-770

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 products

Red Hat Enterprise Linux 10: all versions — fixed in 0:1.26.7-2.el10_2.3
Red Hat Enterprise Linux 10.0 Extended Update Support: all versions — fixed in 0:1.24.11-1.el10_0.4
Red Hat Enterprise Linux 7 Extended Lifecycle Support: all versions — fixed in 0:1.10.4-4.el7_9.3
Red Hat Enterprise Linux 8: all versions — fixed in 0:1.16.1-7.el8_10.3
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support: all versions — fixed in 0:1.16.1-4.el8_4.2
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On: all versions — fixed in 0:1.16.1-4.el8_4.2
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support: all versions — fixed in 0:1.16.1-4.el8_6.3
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On: all versions — fixed in 0:1.16.1-4.el8_6.3
Red Hat Enterprise Linux 8.8 Telecommunications Update Service: all versions — fixed in 0:1.16.1-5.el8_8.3
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions: all versions — fixed in 0:1.16.1-5.el8_8.3
Red Hat Enterprise Linux 9: all versions — fixed in 0:1.22.12-7.el9_8.2
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions: all versions — fixed in 0:1.18.4-8.el9_2.2
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions: all versions — fixed in 0:1.22.1-4.el9_4.2
Red Hat Enterprise Linux 9.6 Extended Update Support: all versions — fixed in 0:1.22.12-5.el9_6.2

How to fix

Upgrade to a fixed version: Red Hat Enterprise Linux 10 0:1.26.7-2.el10_2.3; Red Hat Enterprise Linux 10.0 Extended Update Support 0:1.24.11-1.el10_0.4; Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:1.10.4-4.el7_9.3; Red Hat Enterprise Linux 8 0:1.16.1-7.el8_10.3; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:1.16.1-4.el8_4.2; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:1.16.1-4.el8_4.2; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:1.16.1-4.el8_6.3; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:1.16.1-4.el8_6.3; Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:1.16.1-5.el8_8.3; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:1.16.1-5.el8_8.3; Red Hat Enterprise Linux 9 0:1.22.12-7.el9_8.2; Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:1.18.4-8.el9_2.2. Check the vendor advisory for mitigations.

References

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