Vulnerability Report

CVE-2026-18649

Title: GStreamer RTP Depayloader Reassembly Buffer Overflow Denial of Service

DoS

Proof Of Concept

PoC Available for CVE-2026-18649

CWE Category CWE-770

Published Date Aug 06, 2026

Modified Date Aug 06, 2026

Exploit Status Available

Score 7.5 CVSS v3.1

Exploit Probability (EPSS)

0.56%

Vulnerability Summary

CVE-2026-18649: 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.

Impacted Vendors

Analysis in Progress...

Reference Links

https://access.redhat.com/security/cve/CVE-2026-18649 https://bugzilla.redhat.com/show_bug.cgi?id=2510614 https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/113

CVSS v3.1

Source Entity [email protected]

Severity HIGH

7.5

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-18649 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/0xSemizzz/CVE-2026-18649

View Code

August 06, 2026 MODIFIED

Vulnerability data updated via NVD.

August 06, 2026 MODIFIED

Vulnerability data updated via NVD.

August 06, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Stack

No specific products linked.