Code execution via unchecked H.266 SEI length
Published Jul 7, 2025 · Updated Jul 7, 2025
Stack-based buffer overflow in GStreamer gst-plugins-bad 1.26.0 through 1.26.2 allows attackers to execute code via crafted H.266 video. The H.266 SEI parser copies attacker-controlled subpicture level data into a fixed-length stack buffer without validating its length. A consuming application must process the malicious media; successful exploitation runs code in that application's process, while failed exploitation can crash it.
Summary
What happened
Stack-based buffer overflow in GStreamer gst-plugins-bad 1.26.0 through 1.26.2 allows attackers to execute code via crafted H.266 video. The H.266 SEI parser copies attacker-controlled subpicture level data into a fixed-length stack buffer without validating its length. A consuming application must process the malicious media; successful exploitation runs code in that application's process, while failed exploitation can crash it.
The record
- CVE
- CVE-2025-6663
- Published
- Jul 7, 2025
- Updated
- Jul 7, 2025
- Vendor
- GStreamer Project
- Product
- GStreamer
- Classifications
- CWE-121, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 7, 2025CVE publishedPublication date reported by the CVE source.
- Jul 7, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=97fec43422c4b62d569957d721c899bdaaa9da61
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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