strukturag libheif up to 1.21.x AVIF File entry_count out-of-bounds

Summaryinfo

A vulnerability identified as problematic has been detected in strukturag libheif up to 1.21.x. The affected element is an unknown function of the component AVIF File Handler. Performing a manipulation of the argument entry_count results in out-of-bounds. This vulnerability was named CVE-2026-41069. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in strukturag libheif up to 1.21.x. This affects some unknown functionality of the component AVIF File Handler. The manipulation of the argument entry_count with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on availability. The summary by CVE is:

libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, a malformed HEIF sequence file can trigger an out-of-bounds read in core sequence parsing logic, causing DoS. A malformed file can have stco.entry_count == 0 (creating no chunks) while still passing validation because saio.entry_count == 0 matches, but with saiz.sample_count > 0 the SampleAuxInfoReader constructor still enters its loop. This leads to an out-of-bounds dereference on the empty chunks[0] in chunked mode.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-41069 since 04/16/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 316594 (Linux Distros Unpatched Vulnerability : CVE-2026-41069), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.22.0 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (316594). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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