CVE-2026-3949 MEDIUM

CVE-2026-3949: strukturag libheif HEIF File decoder_vvdec.cc vvdec_push_data2 out-of-bounds

Vendor Strukturag
Product libheif
Weakness CWE-125
Published March 11, 2026
Last update March 11, 2026

CVSS base score

4.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 11, 2026 CVE published
March 11, 2026 Record updated