CVE-2026-49271

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.

• CWE-125

• https://github.com/strukturag/libheif/security/advisories/GHSA-r7qj-cg5r-r6vfMitigation, Vendor Advisory
• https://github.com/strukturag/libheif/security/advisories/GHSA-r7qj-cg5r-r6vfMitigation, Vendor Advisory

Published

Jun 19, 2026

Last Modified

Jun 26, 2026

Status

Analyzed

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