CVE-2026-47178 — libheif has Heap Out Of Bounds Write in unci subsystem

CVE-2026-47178

libheif has Heap Out Of Bounds Write in unci subsystem PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
strukturag / libheif	affected >= 1.19.0, < 1.22.0

CWE

CWE-787

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.