Bug 2508623 (CVE-2026-5056) - CVE-2026-5056 gstreamer: GStreamer: Arbitrary code execution via stack-based buffer overflow in qtdemux
Summary: CVE-2026-5056 gstreamer: GStreamer: Arbitrary code execution via stack-based ...
Keywords:
Status: NEW
Alias: CVE-2026-5056
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2509700 2509699 2509701 2509702 2509703
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-29 20:02 UTC by OSIDB Bzimport
Modified: 2026-08-03 02:13 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:49508 0 None None None 2026-08-03 02:13:29 UTC

Description OSIDB Bzimport 2026-07-29 20:02:24 UTC 
GStreamer qtdemux Stack-based Buffer Overflow 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 parsing of UncompressedFrameConfigBox structures. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29392.
Comment 3 errata-xmlrpc 2026-08-03 02:13:29 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:49508 https://access.redhat.com/errata/RHSA-2026:49508
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