Code execution via heap buffer overflow
Published Aug 8, 2023 · Updated Aug 10, 2026
Heap-based buffer overflow in Microsoft HEVC Video Extensions allows local users to execute code when crafted media is decoded. The decoder writes beyond a heap buffer while handling untrusted HEVC input, but Microsoft has not disclosed the responsible parser or operation. Exploitation requires user interaction with crafted media and grants code execution in the decoding application's security context.
Summary
What happened
Heap-based buffer overflow in Microsoft HEVC Video Extensions allows local users to execute code when crafted media is decoded. The decoder writes beyond a heap buffer while handling untrusted HEVC input, but Microsoft has not disclosed the responsible parser or operation. Exploitation requires user interaction with crafted media and grants code execution in the decoding application's security context.
The record
- CVE
- CVE-2023-38170
- Published
- Aug 8, 2023
- Updated
- Aug 10, 2026
- Vendor
- Microsoft
- Product
- HEVC Video Extensions
- Classifications
- CWE-122, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 8, 2023CVE publishedPublication date reported by the CVE source.
- Aug 10, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.0.0.0 <2.0.61931.0
- Affected versionversion=1.0.0 <2.0.61933.0
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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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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