strukturag libheif up to 1.22.0 HEIF Decoder out-of-bounds

Summaryinfo

A vulnerability was found in strukturag libheif up to 1.22.0 and classified as problematic. Affected by this vulnerability is an unknown functionality of the component HEIF Decoder. Executing a manipulation can lead to out-of-bounds. This vulnerability is registered as CVE-2026-49271. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in strukturag libheif up to 1.22.0 and classified as problematic. This vulnerability affects an unknown code of the component HEIF Decoder. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-49271 since 05/28/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

Upgrading to version 1.22.1 eliminates this vulnerability.

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Productinfo

Vendor

• strukturag

Name

• libheif

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22.0

Website

• Product: https://github.com/strukturag/libheif/

CPE 2.3info

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