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GStreamer CVE-2026-18299

| EUVDEUVD-2026-63448 HIGH
Use After Free (CWE-416)
2026-08-20 zdi GHSA-7xww-j5h2-23gh
RCE Use After Free Memory Corruption 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

AV:L because exploitation fires inside the local media pipeline; UI:R because the user must process a crafted stream; PR:N since no credentials are needed to supply malicious RTP content.

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
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Red Hat
8.8 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 rtpsbcdepay Use-After-Free 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 RTP payload elements. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29787.

AnalysisAI

Remote code execution in GStreamer's rtpsbcdepay plugin is achieved when a user processes a crafted RTP stream containing malformed SBC audio payload, triggering a use-after-free that corrupts heap memory and redirects execution to attacker-controlled code within the affected process. The flaw exists in all GStreamer installations where the rtpsbcdepay element is exercised, covering a broad surface area including Linux media players, VoIP clients, and Bluetooth audio gateways. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Vulnerability AssessmentAI

Exploitation Exploitation requires that a GStreamer-based application on the target system is actively processing an RTP stream that carries SBC-encoded audio through the rtpsbcdepay pipeline element. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.0 score of 7.8 with vector AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H reflects full confidentiality, integrity, and availability impact within the vulnerable process, but scope is unchanged and user interaction is mandatory. … 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 The primary remediation is to update GStreamer to a version incorporating upstream commit 99fde1184fe8b12d0721230941c1bf2080913183; consult the GStreamer vendor advisory at https://gstreamer.freedesktop.org/security/sa-2026-0051.html for the exact patched release tag, as a specific version number was not confirmed in the available intelligence data. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Inventory all systems running GStreamer with rtpsbcdepay plugin enabled, including VoIP applications, media players, and Bluetooth audio services; document exposure across Linux infrastructure. …

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Liberty Linux 10 Fixed
SUSE Liberty Linux 8 Fixed
SUSE Liberty Linux 9 Fixed
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Module for Basesystem 15 SP7 Affected

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CVE-2026-18299 vulnerability details – vuln.today
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