Bug 2520605 (CVE-2026-18299)

Summary:	CVE-2026-18299 gstreamer: GStreamer: Remote Code Execution via Use-After-Free in rtpsbcdepay
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in GStreamer. This use-after-free vulnerability in the rtpsbcdepay element, specifically during the processing of Real-time Transport Protocol (RTP) payload elements, allows a remote attacker to execute arbitrary code. The issue arises from a lack of validation for an object's existence before operations are performed on it. Successful exploitation can lead to arbitrary code execution within the context of the current process.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2521068, 2521066, 2521067, 2521069, 2521070, 2521091
Bug Blocks:

Description OSIDB Bzimport 2026-08-20 16:56:37 UTC

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.

Comment 2 errata-xmlrpc 2026-08-24 21:27:27 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:59152 https://access.redhat.com/errata/RHSA-2026:59152

Comment 3 errata-xmlrpc 2026-08-24 21:39:32 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:59179 https://access.redhat.com/errata/RHSA-2026:59179

Comment 4 errata-xmlrpc 2026-08-26 07:29:53 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:59972 https://access.redhat.com/errata/RHSA-2026:59972