libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, the inline mask parsing code in `libheif/region.cc` contains an integer overflow. Both `width` and `height` are `unsigned int` (32-bit) values parsed from the HEIF file. Their product can exceed `UINT32_MAX`, wrapping to a small value before the division by 8. This causes an undersized buffer allocation, leading to out-of-bounds memory access when the mask data is later interpreted as a `width x height` bitmap. Version 1.22.0 patches the issue.
Metrics
Affected Vendors & Products
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References
History
Tue, 21 Jul 2026 21:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, the inline mask parsing code in `libheif/region.cc` contains an integer overflow. Both `width` and `height` are `unsigned int` (32-bit) values parsed from the HEIF file. Their product can exceed `UINT32_MAX`, wrapping to a small value before the division by 8. This causes an undersized buffer allocation, leading to out-of-bounds memory access when the mask data is later interpreted as a `width x height` bitmap. Version 1.22.0 patches the issue. | |
| Title | libheif has integer overflow in inline mask size calculation that causes undersized buffer allocation | |
| Weaknesses | CWE-190 | |
| References |
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| Metrics |
cvssV3_1
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-21T21:04:06.167Z
Reserved: 2026-05-19T21:29:25.482Z
Link: CVE-2026-47714
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
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