Gstreamer EUVD-2026-12123

| CVE-2026-3082 HIGH

Heap-based Buffer Overflow (CWE-122)

2026-03-13 zdi

RCE Buffer Overflow Heap Overflow Gstreamer

7.8

CVSS 3.1 · Vendor: zdi

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Craft malicious JPEG with oversized Huffman table
Exploit

Application parses JPEG via GStreamer
Execution

Overflow heap buffer in Huffman parser
Impact

Execute arbitrary code with user privileges

Vulnerability Assessment

Weakness	CWE CWE-122 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Heap buffer bounds checking MITRE ATT&CK 1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	GStreamer library must process attacker-controlled JPEG files with crafted Huffman tables. User interaction required to open/process the malicious JPEG file. Affects applications embedding GStreamer's JPEG decoder.
Impact	Despite the high CVSS score of 7.8, the real-world risk is moderate. The CVSS vector (AV:L/AC:L/PR:N/UI:R) indicates local attack vector with required user interaction, limiting remote exploitation scenarios. No EPSS data suggests uncertain exploitation probability. The vulnerability is not listed in CISA KEV, indicating no known active exploitation. No public POC has been identified. The SSVC framework would likely classify this as 'Attend' priority - while the technical impact is high (RCE), the exploitation requires user interaction and local access, reducing automation potential. This is a high-CVSS-but-moderate-real-risk issue for most environments.
Exploit ScenarioDerived	An attacker would need to craft a malicious JPEG file with specially crafted Huffman tables that trigger the buffer overflow. The victim must open or process this JPEG using an application that utilizes GStreamer's JPEG parsing capabilities. Upon processing, the overflow could allow the attacker to execute arbitrary code with the privileges of the application. The local attack vector and user interaction requirement suggest scenarios like malicious email attachments, compromised media files on websites, or poisoned media libraries. No public POC exists, but the technical details suggest exploitation is feasible for skilled attackers.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 13, 2026

Heap-based buffer overflow vulnerability in the GStreamer multimedia framework's JPEG parser that allows remote code execution when processing malicious Huffman tables. The vulnerability affects all versions of GStreamer (CPE shows wildcard versioning) and requires user interaction to exploit, with a CVSS score of 7.8. No active exploitation in the wild has been reported (not in KEV), and no EPSS data is available.

RemediationAI

A patch is available via GitLab commit 7d3c258ed928cf59d126c8ea926b185f046f444c in the GStreamer repository. Users should update to a GStreamer version containing this fix. As a temporary mitigation, restrict processing of untrusted JPEG files through GStreamer or implement input validation for JPEG content. Monitor the official GStreamer GitLab repository (https://gitlab.freedesktop.org/gstreamer/gstreamer/) for release notes indicating which versions include this security fix.

Affected VersionsENISA

GStreamer 1c6e163aa33962f5ee4a87d29319ccdd5cb67612

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Technical ContextAI · show details

GStreamer is an open-source multimedia framework used across Linux distributions and applications for media processing. The vulnerability (CWE-122: Heap-based Buffer Overflow) occurs in the JPEG parser component when processing Huffman tables - a critical part of JPEG compression. The flaw stems from insufficient validation of user-supplied data length before copying to a fixed-size heap buffer. Based on the CPE string (cpe:2.3:a:gstreamer:gstreamer:*:*:*:*:*:*:*:*), all GStreamer versions are potentially affected. The vulnerability was originally tracked as ZDI-CAN-28840 by Zero Day Initiative.

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Exploit and PoC references, threat intelligence from 22 sources

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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

Red Hat 7.8 HIGH

Primary rating from Vendor (zdi).

CVSS VectorVendor: zdi

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

GStreamer JPEG Parser Heap-based Buffer 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 processing of Huffman tables. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28840.

Zero Day Initiative Advisories

ZDI-26-163 GStreamer JPEG Parser Heap-based Buffer Overflow Remote Code Execution Vulnerability Mar 2026

Executive ViewAI

Why It Matters

CVE-2026-3082 is a high-severity vulnerability in GStreamer that could allow attackers to execute malicious code on systems processing specially crafted media files. Organizations using GStreamer for multimedia processing-including video streaming platforms, content management systems, and media servers-face potential compromise if users interact with attacker-controlled files.

Business Impact: High

Compensating Controls

Disable GStreamer JPEG parsing capability if not required for business operations. Implement strict file upload validation and sandboxing for media processing. Restrict GStreamer usage to trusted, internal content sources only. Deploy application-level input filtering for media files. Consider network segmentation to isolate systems running GStreamer. Monitor GStreamer vendor channels for patch availability and establish rapid deployment procedures when released.

Threat Intelligence Overview

EPSS Score

0.1%

Top 82% exploitable

Data Quality

6 sources

Confidence: High

EUVD

CVE.org

EPSS Vendor

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.1%

Patch available Yes

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

No

Human Impact

High

Priority Score

39

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +39

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Heap Overflow HIGH

A heap overflow occurs when a program writes data beyond the bounds of a buffer allocated in the heap memory region.

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

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Heap-based buffer overflow in the flx_decode_delta_fli function in gst/flx/gstflxdec.c in the FLIC decoder in GStreamer

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Heap-based buffer overflow in the flx_decode_delta_fli function in gst/flx/gstflxdec.c in the FLIC decoder in GStreamer

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Vendor StatusVendor

SUSE

Severity: High

Product	Status
SUSE Liberty Linux 10	Fixed
SUSE Liberty Linux 8	Fixed
SUSE Liberty Linux 9	Fixed
SUSE Linux Enterprise Desktop 15 SP7	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7	Fixed

References

Advisories & patches

ADVISORY https://access.redhat.com/errata/RHSA-2026:6259 ADVISORY https://access.redhat.com/errata/RHSA-2026:6300 ADVISORY https://access.redhat.com/errata/RHSA-2026:6750 ADVISORY https://access.redhat.com/errata/RHSA-2026:7673 ADVISORY https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/7d3c258ed928cf59d126c8ea926b185f046f444c ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-3082 ADVISORY https://vuldb.com/?id.349624 REF https://access.redhat.com/errata/RHSA-2026:19024 REF https://access.redhat.com/errata/RHSA-2026:19180 REF https://access.redhat.com/errata/RHSA-2026:8854 REF https://access.redhat.com/errata/RHSA-2026:8857 REF https://access.redhat.com/errata/RHSA-2026:8862 REF https://access.redhat.com/errata/RHSA-2026:8874 REF https://access.redhat.com/errata/RHSA-2026:8876 REF https://access.redhat.com/errata/RHSA-2026:9446 REF https://access.redhat.com/errata/RHSA-2026:9447 REF https://access.redhat.com/errata/RHSA-2026:9487 REF https://access.redhat.com/errata/RHSA-2026:9488 REF https://access.redhat.com/security/cve/CVE-2026-3082 REF https://bugzilla.redhat.com/show_bug.cgi?id=2447492 REF https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3082.json REF https://www.zerodayinitiative.com/advisories/ZDI-26-163/

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