Bug 2447503 (CVE-2026-2923)

Summary:	CVE-2026-2923 GStreamer: GStreamer: Remote Code Execution via out-of-bounds write in DVB Subtitles handling
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	Keywords:	Security
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in GStreamer. This out-of-bounds write vulnerability in the DVB (Digital Video Broadcasting) Subtitles handling allows remote attackers to execute arbitrary code. The issue stems from improper validation of user-supplied coordinate data, which can lead to writing beyond the boundaries of an allocated memory buffer. Successful exploitation can result in arbitrary code execution within the context of the current process.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2448016, 2447998, 2448002, 2448021, 2448025
Bug Blocks:

Description OSIDB Bzimport 2026-03-13 21:02:48 UTC

GStreamer DVB Subtitles Out-Of-Bounds Write 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 handling of coordinates. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28838.

Comment 2 errata-xmlrpc 2026-03-31 13:04:49 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:6259 https://access.redhat.com/errata/RHSA-2026:6259

Comment 3 errata-xmlrpc 2026-03-31 19:40:21 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:6300 https://access.redhat.com/errata/RHSA-2026:6300

Comment 6 errata-xmlrpc 2026-04-07 08:13:23 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:6750 https://access.redhat.com/errata/RHSA-2026:6750

Comment 7 errata-xmlrpc 2026-04-20 02:52:21 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:8854 https://access.redhat.com/errata/RHSA-2026:8854

Comment 8 errata-xmlrpc 2026-04-20 04:23:03 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:8862 https://access.redhat.com/errata/RHSA-2026:8862

Comment 9 errata-xmlrpc 2026-05-19 13:03:10 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:19024 https://access.redhat.com/errata/RHSA-2026:19024

Comment 10 errata-xmlrpc 2026-05-19 17:59:47 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:19180 https://access.redhat.com/errata/RHSA-2026:19180