CVE-2026-3949

Low

Description

A vulnerability was determined in strukturag libheif up to 1.21.2. This affects the function vvdec_push_data2 of the file libheif/plugins/decoder_vvdec.cc of the component HEIF File Parser. Executing a manipulation of the argument size can lead to out-of-bounds read. The attack needs to be launched locally. The exploit has been publicly disclosed and may be utilized. This patch is called b97c8b5f198b27f375127cd597a35f2113544d03. It is advisable to implement a patch to correct this issue.

SeverityLow

CVSS3.3

Exploit probability—

ProductStrukturag Libheif

PublishedMar 11, 2026

First seenMar 11, 2026

Weakness typeCWE-125Out-of-bounds read CWE-119Memory buffer bounds error

How to fix

Patches

github.com/strukturag/libheif/commit/b97c8b5f198b27f375127cd597a35f2113544d03

Affected products

Product	Affected versions	Fixed in
strukturag libheif	1.21.0, 1.21.1, 1.21.2	—

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