strukturag libheif up to 1.21.x Public C API heif_image_handle_get_image_tiling null pointer dereference

Summaryinfo

A vulnerability identified as problematic has been detected in strukturag libheif up to 1.21.x. The affected element is the function heif_image_handle_get_image_tiling of the component Public C API. The manipulation leads to null pointer dereference. This vulnerability is traded as CVE-2026-47709. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in strukturag libheif up to 1.21.x and classified as problematic. This issue affects the function heif_image_handle_get_image_tiling of the component Public C API. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

libheif is a HEIF and AVIF file format decoder and encoder. Versions prior to 1.22.0 crashes in the public C API `heif_image_handle_get_image_tiling()` when a malformed uncompressed HEIF image item has an associated `uncC` property but no associated `ispe` property. In debug builds this trips the `ispe && uncC` assertion in `ImageItem_uncompressed::get_heif_image_tiling()`. In a release/NDEBUG ASan build, the same file causes a null pointer read at address `0xa8`. Version 1.22.0 fixes the issue.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-47709 since 05/19/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 1.22.0 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

Website

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

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