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CVE-2026-18299

GStreamer rtpsbcdepay Use-After-Free Remote Code Execution Vulnerability

HIGH
7.8
CVSS Score
Published: August 20, 2026 at 04:22 PM UTC
Updated: October 26, 2026 at 10:10 AM UTC
2 products affected across 2 vendorsGStreamerGstreamer

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

GStreamer· Gstreamer
90%
99fde1184fe8b12d0721230941c1bf2080913183
Affected range stops below 1.28.5, so it looks safe — our inference, not a vendor statement
Gstreamer· Gstreamer Project
75%
v < 1.28.5
Affected range stops below 1.28.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_research-advisoryThird Party Advisory
Source: cverecord
https://www.zerodayinitiative.com/advisories/ZDI-26-467/
Vendor AdvisoryPatch
Source: cverecord
https://gstreamer.freedesktop.org/security/sa-2026-0051.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHzdi
Vector?

Quick Info

StatusANALYZED
CWE
CWE-416

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