CVE-2026-49271
Medium
Description
libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.1, the uncompressed HEIF decoder validates explicit icef compressed-unit offsets using unit_offset + unit_size. Because the addition can wrap, a crafted HEIF file can pass the range check and then construct a vector from iterators outside the compressed item buffer, producing an out-of-bounds heap read and crash. Version 1.22.1 patches the issue.
SeverityMedium
CVSS6.5
Exploit probability—
ProductStruktur Libheif
PublishedJun 19, 2026
First seenJun 19, 2026
Weakness typeCWE-125Out-of-bounds read
How to fix
Update
- struktur libheif1.22.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| struktur libheif | v < 1.22.1 | 1.22.1 |
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