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GStreamer CVE-2026-18297

| EUVDEUVD-2026-63446 HIGH
Stack-based Buffer Overflow (CWE-121)
2026-08-20 zdi GHSA-gqxr-5q6c-5cqh
RCE Buffer Overflow Stack Overflow Gstreamer
7.8
CVSS 3.0 · 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
vuln.today AI
7.8 HIGH

Local attack vector because exploitation occurs during file parsing on victim's machine; no privileges required and user must open the malicious file.

3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
8.8 HIGH
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Red Hat
7.8 HIGH
qualitative

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

Lifecycle Timeline

2
Analysis Generated
Aug 20, 2026 - 17:30 vuln.today
CVE Published
Aug 20, 2026 - 16:22 cve.org
HIGH 7.8

DescriptionCVE.org

GStreamer OGG File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of OGG files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29584.

AnalysisAI

Stack-based buffer overflow in GStreamer's OGG file parsing component allows remote attackers to execute arbitrary code in the context of the current process. Affected installations of GStreamer fail to validate the length of user-supplied data before copying it to a stack-based buffer during OGG container parsing, enabling full code execution (C:H/I:H/A:H). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Execution
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Vulnerability AssessmentAI

Exploitation Exploitation requires the target user to actively open a malicious OGG file or visit a web page or application that invokes GStreamer's OGG parsing on attacker-controlled content (UI:R per CVSS). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS 7.8 vector (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) reflects a local attack surface requiring user interaction, which aligns with the described exploitation scenario of opening a malicious OGG file or visiting a web page that triggers GStreamer parsing. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Apply the fix referenced in the GStreamer security advisory sa-2026-0053 at https://gstreamer.freedesktop.org/security/sa-2026-0053.html. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, identify all GStreamer installations across the organization, prioritizing systems that process untrusted media files (user uploads, external feeds, automated processing). …

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Liberty Linux 10 Fixed
SUSE Liberty Linux 8 Fixed
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Micro 5.3 Affected
SUSE Linux Enterprise Micro 5.4 Affected

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CVE-2026-18297 vulnerability details – vuln.today
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