Bug 2447490 (CVE-2026-2920)

Summary: CVE-2026-2920 GStreamer: GStreamer: Arbitrary code execution via ASF file processing
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in GStreamer. This heap-based buffer overflow vulnerability in the ASF Demuxer component allows a remote attacker to execute arbitrary code. The issue arises from insufficient validation of user-supplied data length when processing stream headers within ASF (Advanced Systems Format) files, leading to data being copied to a fixed-length heap-based buffer without proper bounds checking. Successful exploitation can result in arbitrary code execution in the context of the current process.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2447935, 2447936, 2447933, 2447934, 2447937    
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Description OSIDB Bzimport 2026-03-13 21:02:09 UTC 
GStreamer ASF Demuxer Heap-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 processing of stream headers within ASF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28843.