Heap buffer overflow via unchecked image dimensions
Published Jul 20, 2026 · Updated Jul 20, 2026
Heap buffer overflow in libvips 8.18.0 and earlier allows local users to corrupt process memory through a crafted VIPS image. The vips_image_sanity path used unchecked image element-size, band-count, width, and height products before allocation and image-size macros consumed the result. Exploitation requires local low-privilege access and dimension values that overflow the 64-bit size calculation; the resulting undersized heap buffer permits out-of-bounds writes and can crash the calling process.
Summary
What happened
Heap buffer overflow in libvips 8.18.0 and earlier allows local users to corrupt process memory through a crafted VIPS image. The vips_image_sanity path used unchecked image element-size, band-count, width, and height products before allocation and image-size macros consumed the result. Exploitation requires local low-privilege access and dimension values that overflow the 64-bit size calculation; the resulting undersized heap buffer permits out-of-bounds writes and can crash the calling process.
The record
- CVE
- CVE-2026-33327
- Published
- Jul 20, 2026
- Updated
- Jul 20, 2026
- Vendor
- libvips
- Product
- libvips
- Classifications
- CWE-190
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 20, 2026CVE publishedPublication date reported by the CVE source.
- Jul 20, 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=<= 8.18.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
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Your stack
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