CVE-2026-2920
Heap-Based Buffer Overflow in GStreamer ASF Demuxer Enables RCE
Publication date: 2026-03-16
Last updated on: 2026-03-17
Assigner: Zero Day Initiative
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| gstreamer | gstreamer | to 1.28.1 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-122 | A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2026-2920 is a remote code execution vulnerability in the GStreamer ASF Demuxer caused by a heap-based buffer overflow.
The flaw arises from improper validation of the length of user-supplied data when processing stream headers within ASF files. Specifically, the vulnerability occurs because the length of the input data is not properly checked before copying it into a fixed-length heap buffer, allowing an attacker to overflow the buffer.
Exploiting this vulnerability requires interaction with the GStreamer library, but attack vectors may vary depending on the implementation. Successful exploitation enables remote attackers to execute arbitrary code with the privileges of the current process.
How can this vulnerability impact me? :
This vulnerability allows remote attackers to execute arbitrary code on affected systems running GStreamer.
Because the attacker can run code with the privileges of the current process, this can lead to full compromise of the affected system, including unauthorized access, data manipulation, or disruption of services.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability involves a heap-based buffer overflow in the GStreamer ASF Demuxer when processing ASF file stream headers. Detection typically requires monitoring for the presence of vulnerable versions of the GStreamer library or analyzing ASF file processing behavior.
Since exploitation requires interaction with the GStreamer library, one approach is to identify systems running GStreamer versions prior to the fix and monitor for suspicious ASF file processing or crashes related to ASF demuxing.
No specific detection commands or signatures are provided in the available resources.
What immediate steps should I take to mitigate this vulnerability?
The primary mitigation step is to update GStreamer to the latest version that includes the fix for this vulnerability.
Additionally, avoid processing untrusted ASF files with vulnerable versions of GStreamer to reduce the risk of exploitation.