CVE-2026-3084
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Integer Underflow in GStreamer H.266 Parser Enables Remote Code Execution

Publication date: 2026-03-16

Last updated on: 2026-03-17

Assigner: Zero Day Initiative

Description
GStreamer H.266 Codec Parser Integer Underflow 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 parsing of picture partitions. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28910.
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Meta Information
Published
2026-03-16
Last Modified
2026-03-17
Generated
2026-06-16
AI Q&A
2026-03-16
EPSS Evaluated
2026-06-15
NVD
CVE-2026-3084
EUVD
EUVD-2026-12127
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
gstreamer gstreamer to 1.28.1 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-191 The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.
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Executive Summary

This vulnerability is an integer underflow in the GStreamer H.266 Codec Parser. It occurs due to improper validation of user-supplied data during the parsing of picture partitions. This flaw can cause an integer underflow before writing to memory, which can be exploited by remote attackers to execute arbitrary code within the context of the affected process.

Impact Analysis

If exploited, this vulnerability allows remote attackers to execute arbitrary code on systems using the affected GStreamer library. This can lead to full compromise of the affected process, potentially allowing attackers to take control of the system, steal data, or disrupt operations.

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