Vulnerability Description
libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, a crafted HEIF sequence file where the saiz box declares more samples than actually exist in the track's chunk table causes a heap-buffer-overflow (out-of-bounds read) in the SampleAuxInfoReader constructor. The SampleAuxInfoReader constructor iterates over saiz->get_num_samples() samples but doesn't validate that this count is consistent with the number of chunks in the chunks vector. When saiz declares more samples than the chunks cover, the loop increments current_chunk past chunks.size(), causing an out-of-bounds read on the chunks vector. The vulnerability is triggered during file parsing (heif_context_read_from_file) without any additional user interaction. Any application using libheif to open untrusted HEIF files is affected. This issue has been fixed in version 1.22.0.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Struktur | Libheif | < 1.22.0 |
Related Weaknesses (CWE)
References
- https://github.com/strukturag/libheif/releases/tag/v1.22.0ProductRelease Notes
- https://github.com/strukturag/libheif/security/advisories/GHSA-xj92-xjff-h8w3ExploitMitigationVendor Advisory
FAQ
What is CVE-2026-41071?
CVE-2026-41071 is a vulnerability with a CVSS score of 8.1 (HIGH). libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, a crafted HEIF sequence file where the saiz box declares more samples than actually exist in the track's chunk...
How severe is CVE-2026-41071?
CVE-2026-41071 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-41071?
Check the references section above for vendor advisories and patch information. Affected products include: Struktur Libheif.