Code execution via pic_timing SEI stack overflow
Published Mar 13, 2026 · Updated Mar 13, 2026
Stack buffer overflow in GStreamer gst-plugins-bad 1.25.1 through 1.28.0 allows attackers to execute code via crafted H.266 video. The H.266 bitstream parser copies attacker-controlled pic_timing SEI decoding-unit data into a fixed-length stack buffer without validating its length. A GStreamer-based application must process the malicious stream or file; successful corruption runs code in that application's process, while failed exploitation crashes it.
Summary
What happened
Stack buffer overflow in GStreamer gst-plugins-bad 1.25.1 through 1.28.0 allows attackers to execute code via crafted H.266 video. The H.266 bitstream parser copies attacker-controlled pic_timing SEI decoding-unit data into a fixed-length stack buffer without validating its length. A GStreamer-based application must process the malicious stream or file; successful corruption runs code in that application's process, while failed exploitation crashes it.
The record
- CVE
- CVE-2026-3081
- Published
- Mar 13, 2026
- Updated
- Mar 13, 2026
- Vendor
- GStreamer Project
- Product
- GStreamer
- Classifications
- CWE-121, CWE-120, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 13, 2026CVE publishedPublication date reported by the CVE source.
- Mar 13, 2026Record 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=1c6e163aa33962f5ee4a87d29319ccdd5cb67612
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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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