CVE-2026-2921
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Integer Overflow in GStreamer Palette Handling Enables RCE

Publication date: 2026-03-16

Last updated on: 2026-03-29

Assigner: Zero Day Initiative

Description
GStreamer RIFF Palette Integer Overflow 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 handling of palette data in AVI files. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28854.
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Meta Information
Published
2026-03-16
Last Modified
2026-03-29
Generated
2026-06-16
AI Q&A
2026-03-16
EPSS Evaluated
2026-06-14
NVD
CVE-2026-2921
EUVD
EUVD-2026-12115
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
gstreamer gstreamer to 1.28.1 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-190 The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
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Executive Summary

CVE-2026-2921 is a remote code execution vulnerability in the GStreamer multimedia framework. It arises from improper validation of user-supplied palette data within RIFF AVI files, which leads to an integer overflow before writing to memory.

This integer overflow can be exploited by remote attackers to execute arbitrary code within the context of the current process. Exploitation requires interaction with the GStreamer library, but the exact attack vectors may vary depending on how GStreamer is implemented.

Impact Analysis

This vulnerability allows remote attackers to execute arbitrary code on affected systems running GStreamer. Successful exploitation can lead to full compromise of the affected process, potentially allowing attackers to take control of the system or perform unauthorized actions.

Compliance Impact

I don't know

Detection Guidance

This vulnerability involves the handling of palette data in RIFF AVI files by the GStreamer library, leading to an integer overflow. Detection would require monitoring or analyzing interactions with GStreamer when processing AVI files.

There are no specific commands or network detection methods provided in the available resources to detect exploitation attempts or presence of this vulnerability on your system or network.

Mitigation Strategies

The immediate mitigation step is to update GStreamer to the latest version where this vulnerability has been addressed and corrected.

Additionally, avoid processing untrusted or malicious AVI files that could exploit the integer overflow in palette data handling.

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