CVE-2026-47178 | libheif is a HEIF and AVIF file format decoder and encoder. … | CVSS 6.1 MEDIUM

Description

libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.19.0 through 1.21.2, a crafted HEIF file (uncompressed `unci` codec, tiled, component-interleaved, 4:2:0) triggers a heap out-of-bounds write in libheif's uncompressed tile decoder. The write overwrites the C++ vtable pointer of an adjacent `unc_decoder_component_interleave` object; the next virtual call dispatches to an attacker-chosen address. Version 1.22.0 patches the issue.

Metadata

CVE ID: CVE-2026-47178
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-05-18 21:25 UTC
Published: 2026-07-21 21:09 UTC
Last updated: 2026-07-21 21:09 UTC
Primary CWE: CWE-787
CWE-787: Out-of-bounds Write
Vendor / Product: strukturag / libheif
Sources: cve.org · NVD

Severity & Metrics

6.1 MEDIUM CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

Affected products (1)

Vendor	Product	Platform	Versions
strukturag	libheif	—	>= 1.19.0, < 1.22.0

Weakness (CWE)

CWE	Source	Description
CWE-787	cna	CWE-787: Out-of-bounds Write

CVSS scores (1)

Score	Severity	Version	Source	Vector
6.1	MEDIUM	3.1	cna	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

References (1)

https://github.com/strukturag/libheif/security/advisories/GHSA-5x55-x5pf-9c6g https://github.com/strukturag/libheif/security/advisories/GHSA-5x55-x5pf-9c6g