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.
References10
- 0xsemizzz.vercel.app/projects/cve-2026-18649-gstreamer-rtp-dos/
- access.redhat.com/errata/RHSA-2026:53451
- access.redhat.com/errata/RHSA-2026:53452
- access.redhat.com/errata/RHSA-2026:56966
- access.redhat.com/errata/RHSA-2026:61588
- access.redhat.com/errata/RHSA-2026:61943
- access.redhat.com/errata/RHSA-2026:65959
- access.redhat.com/errata/RHSA-2026:65999
- access.redhat.com/errata/RHSA-2026:69232
- access.redhat.com/errata/RHSA-2026:70264
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 62 · as of 12 November 2026
- CWE
- CWE-770
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.