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Gstreamer CVE-2026-3086

| EUVDEUVD-2026-12131 HIGH
Out-of-bounds Write (CWE-787)
2026-03-13 zdi
Buffer Overflow RCE Memory Corruption Gstreamer
7.8
CVSS 3.1 · Vendor: zdi
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Severity by source

Vendor (zdi) PRIMARY
7.8 HIGH
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SUSE
HIGH
qualitative
Red Hat
7.8 HIGH
qualitative

Primary rating from Vendor (zdi).

CVSS VectorVendor: zdi

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
EUVD ID Assigned
Mar 13, 2026 - 21:01 euvd
EUVD-2026-12131
Analysis Generated
Mar 13, 2026 - 21:01 vuln.today
CVE Published
Mar 13, 2026 - 20:40 nvd
HIGH 7.8

DescriptionCVE.org

GStreamer H.266 Codec Parser 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 APS units. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28911.

AnalysisAI

CVE-2026-3086 is an out-of-bounds write vulnerability in GStreamer's H.266 codec parser that allows remote code execution when processing malformed APS (Adaptation Parameter Set) units. The vulnerability affects all versions of GStreamer (CPE shows wildcard versioning) and requires user interaction to exploit, such as processing a malicious H.266 video file. No evidence of active exploitation (not in KEV), no public POC, and no EPSS score available yet.

Technical ContextAI

GStreamer is a widely-used open-source multimedia framework that processes various audio/video codecs including H.266/VVC (Versatile Video Coding). The vulnerability occurs in the H.266 codec parser when processing APS units - these are parameter sets that configure the decoder for specific video sequences. The flaw is a classic CWE-787 (Out-of-bounds Write) where insufficient validation of user-supplied data in APS units allows writing past allocated buffer boundaries. Based on CPE data (cpe:2.3:a:gstreamer:gstreamer:*:*:*:*:*:*:*:*), all GStreamer versions appear affected.

RemediationAI

A patch is available via GitLab commit 025d59cf3459c2903f0384b6b94bc3235e177b53 in the official GStreamer repository. Users should update to the latest GStreamer version containing this fix. As a workaround, disable H.266/VVC codec support if not required, or implement input validation for H.266 streams from untrusted sources. Monitor the official GStreamer security advisories and the Zero Day Initiative advisory ZDI-26-170 for version-specific patch information.

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Same weakness CWE-787 – Out-of-bounds Write

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CVE-2015-3113 CRITICAL POC
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CVE-2010-3333 HIGH POC
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CVE-2014-1761 HIGH POC
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CVE-2009-3129 HIGH POC
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CVE-2021-1732 HIGH POC
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CVE-2013-3346 CRITICAL POC
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Same technique Buffer Overflow

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CVE-2017-7269 CRITICAL POC
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CVE-2009-0927 HIGH POC
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CVE-2012-1889 HIGH POC
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Vendor StatusVendor

SUSE

Severity: High
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise Module for Basesystem 15 SP7 Fixed
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP7 Fixed

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CVE-2026-3086 vulnerability details – vuln.today
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