CVE-2026-47178

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.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 4.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/strukturag/libheif/security/advisories/GHSA-5x55-x5pf-9c6g	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:struktur:libheif:*:*:*:*:*:*:*:*

History

24 Oct 2026, 19:10

Type	Values Removed	Values Added
Summary		(es) libheif es un decodificador y codificador de formato de archivo HEIF y AVIF. En las versiones 1.19.0 a 1.21.2, un archivo HEIF manipulado (códec ’unci’ sin comprimir, en mosaico, con componentes entrelazados, 4:2:0) desencadena una escritura fuera de límites en el heap en el decodificador de mosaicos sin comprimir de libheif. La escritura sobrescribe el puntero de la vtable de C++ de un objeto ’unc_decoder_component_interleave’ adyacente; la siguiente llamada virtual se despacha a una dirección elegida por el atacante. La versión 1.22.0 corrige el problema.

Information

Published : 2026-07-21 22:17

Updated : 2026-10-24 19:10

NVD link : CVE-2026-47178

Mitre link : CVE-2026-47178

CVE.ORG link : CVE-2026-47178

JSON object : View

Products Affected

struktur

libheif

CWE

CWE-787

Out-of-bounds Write

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