CVE-2026-49271
libheif: Wrapped icef compressed-unit range check causes out-of-bounds read in uncompressed HEIF decoder
- State
- Published
- Severity
- 6.5 Medium
- Published
- Jun 19, 2026
- Updated
- Jun 22, 2026
- Reserved
- May 28, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | GitHub_M |
Weaknesses
- CWE-125 Out-of-bounds Read
Affected Products
| Product | Versions |
|---|---|
libheifstrukturag |
|
References
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