What’s Vulnerable › Vulnerabilities
CVE-2026-47178: libheif has Heap Out Of Bounds Write in unci subsystem
- Severity: high (CVSS 7.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2026-07-21 · updated 2026-10-24
- Weakness: CWE-787
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.
Affected products
- strukturag libheif: from 1.19.0 before 1.22.0 — fixed in 1.22.0
How to fix
Upgrade to a fixed version: strukturag libheif 1.22.0. Check the vendor advisory for mitigations.
References
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