Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Struktur | Libheif | >= 1.19.0, < 1.22.0 |
Related Weaknesses (CWE)
References
- https://github.com/strukturag/libheif/security/advisories/GHSA-5x55-x5pf-9c6gExploitVendor Advisory
FAQ
What is CVE-2026-47178?
CVE-2026-47178 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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-...
How severe is CVE-2026-47178?
CVE-2026-47178 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-47178?
Check the references section above for vendor advisories and patch information. Affected products include: Struktur Libheif.