CVE-2026-49271
libheif: Wrapped icef compressed-unit range check causes out-of-bounds read in uncompressed HEIF decoder
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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 | CWE-125 |
| Vendor | strukturag |
| Product | libheif |
| Published | Jun 19, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
strukturag / libheif
< 1.22.1