CVE-2026-3083 in GStreamer
Summary
by MITRE • 03/16/2026
GStreamer rtpqdm2depay Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.
The specific flaw exists within the processing of X-QDM RTP payload elements. When parsing the packetid element, the process does not properly validate user-supplied data, which can result in a write past the end of an allocated array. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28850.
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Analysis
by VulDB Data Team • 06/22/2026
The CVE-2026-3083 vulnerability represents a critical out-of-bounds write flaw in the GStreamer rtpqdm2depay plugin that enables remote code execution through improper input validation. This vulnerability specifically targets the RTP payload processing functionality within the GStreamer multimedia framework, where the rtpqdm2depay element handles X-QDM RTP payload elements. The flaw stems from insufficient validation of the packetid element during packet parsing, creating a condition where maliciously crafted RTP packets can trigger memory corruption. The vulnerability falls under CWE-787: "Out-of-bounds Write" which is classified as a fundamental memory safety issue that can lead to arbitrary code execution when attackers can control the write offset and size. This type of vulnerability is particularly dangerous in multimedia processing libraries since they often handle untrusted data from network sources and are frequently used in streaming applications.
The technical exploitation of this vulnerability occurs when the rtpqdm2depay plugin processes RTP packets containing maliciously crafted X-QDM payload data. During the parsing of the packetid element, the plugin fails to validate the user-supplied data against the allocated array boundaries, allowing an attacker to write data beyond the intended memory allocation. This memory corruption can overwrite adjacent memory locations, potentially including function pointers, return addresses, or other critical program state information. The attack requires interaction with the vulnerable GStreamer library but can be delivered through various network-based attack vectors depending on how the library is integrated into applications. The vulnerability's remote execution capability makes it particularly dangerous as attackers can exploit it without requiring local access to the target system.
The operational impact of CVE-2026-3083 extends across numerous applications that utilize GStreamer for real-time streaming and multimedia processing. Systems affected include video conferencing platforms, streaming media servers, network monitoring tools, and any application that processes RTP traffic through the vulnerable rtpqdm2depay plugin. The vulnerability's exploitation can result in complete system compromise, allowing attackers to execute arbitrary code with the privileges of the running process, which typically corresponds to the user account running the multimedia application. This represents a significant security risk in enterprise environments where multimedia applications are commonly deployed, as successful exploitation could lead to data breaches, system infiltration, or denial of service conditions. The vulnerability's presence in widely-used multimedia frameworks means that the potential attack surface is extensive and includes both enterprise and consumer applications.
Mitigation strategies for CVE-2026-3083 should focus on immediate patching of affected GStreamer installations and implementation of network-based controls. Organizations should prioritize updating to the latest stable versions of GStreamer that contain fixes for this vulnerability, as provided by the maintainers and security vendors. Network segmentation and filtering can help reduce exposure by limiting access to RTP processing endpoints, particularly in environments where the vulnerable library is used for streaming services. Input validation should be implemented at network boundaries to filter out malformed RTP packets before they reach the vulnerable processing components. Additionally, monitoring for unusual network traffic patterns related to RTP processing and implementing application-level controls to restrict RTP payload processing can provide additional defense-in-depth measures. Security teams should also consider implementing the principle of least privilege for applications that utilize GStreamer, limiting the potential impact of successful exploitation through process isolation and reduced system privileges. The vulnerability's classification under ATT&CK technique T1059.007 (Command and Scripting Interpreter: PowerShell) and T1068 (Exploitation for Privilege Escalation) highlights the need for comprehensive security monitoring and response capabilities to detect and mitigate potential exploitation attempts.