Heap disclosure and corruption via pixel offset overflow
Published Sep 11, 2026 · Updated Sep 11, 2026
Integer overflow in libde265 before 1.1.1 allows remote attackers to read heap data, corrupt memory, or crash decoders via crafted HEVC streams. The get_image_plane_at_pos variants multiply ypos by stride with signed 32-bit arithmetic, so dimensions above 46,340 wrap the pixel offset before the image buffer. No privileges or user interaction are required when a network-reachable application passes attacker-controlled HEVC content to the library; successful access can disclose heap data, corrupt memory, or terminate decoding.
Summary
What happened
Integer overflow in libde265 before 1.1.1 allows remote attackers to read heap data, corrupt memory, or crash decoders via crafted HEVC streams. The get_image_plane_at_pos variants multiply ypos by stride with signed 32-bit arithmetic, so dimensions above 46,340 wrap the pixel offset before the image buffer. No privileges or user interaction are required when a network-reachable application passes attacker-controlled HEVC content to the library; successful access can disclose heap data, corrupt memory, or terminate decoding.
The record
- CVE
- CVE-2026-54240
- Published
- Sep 11, 2026
- Updated
- Sep 11, 2026
- Vendor
- Struktur AG
- Product
- libde265
- Classifications
- CWE-190, CWE-787
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 11, 2026CVE publishedPublication date reported by the CVE source.
- Sep 11, 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=< 1.1.1
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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Public exploit references
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Technologies
Your stack
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Your stack
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