Bug 2376845 (CVE-2025-6663)

Summary: CVE-2025-6663 gstreamer: GStreamer Code Execution Vulnerability
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: saroy
Target Milestone: ---Keywords: Security
Target Release: ---Flags: dominik: needinfo? (saroy)
Hardware: All   
OS: Linux   
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A stack based buffer overflow was found in the GStreamer media handling library. This flaw allows an attacker who is able to feed in a maliciously constructed H266 file to execute arbitrary code in the context of the process running GStreamer.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2376991, 2377060    
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Description OSIDB Bzimport 2025-07-07 15:02:51 UTC 
GStreamer H266 Codec Parsing 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 H266 sei messages. 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-27381.
Comment 2 Dominik 'Rathann' Mierzejewski 2025-07-08 14:08:15 UTC 
The actual component is gstreamer1-plugins-bad, don't open duplicate bugs for gstreamer1.