Vulnerability Description
libheif is a HEIF and AVIF file format decoder and encoder. Versions prior to 1.22.0 crashes in the public C API `heif_image_handle_get_image_tiling()` when a malformed uncompressed HEIF image item has an associated `uncC` property but no associated `ispe` property. In debug builds this trips the `ispe && uncC` assertion in `ImageItem_uncompressed::get_heif_image_tiling()`. In a release/NDEBUG ASan build, the same file causes a null pointer read at address `0xa8`. Version 1.22.0 fixes the issue.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Struktur | Libheif | < 1.22.0 |
Related Weaknesses (CWE)
References
- https://github.com/strukturag/libheif/issues/1802ExploitIssue TrackingThird Party Advisory
- https://github.com/strukturag/libheif/pull/1806ExploitIssue TrackingPatch
- https://github.com/strukturag/libheif/security/advisories/GHSA-4h72-vqgp-9376ExploitVendor AdvisoryMitigation
- https://github.com/strukturag/libheif/security/advisories/GHSA-4h72-vqgp-9376ExploitVendor AdvisoryMitigation
FAQ
What is CVE-2026-47709?
CVE-2026-47709 is a vulnerability with a CVSS score of 5.5 (MEDIUM). libheif is a HEIF and AVIF file format decoder and encoder. Versions prior to 1.22.0 crashes in the public C API `heif_image_handle_get_image_tiling()` when a malformed uncompressed HEIF image item ha...
How severe is CVE-2026-47709?
CVE-2026-47709 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-47709?
Check the references section above for vendor advisories and patch information. Affected products include: Struktur Libheif.