Vulnerability Description
libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, when WITH_UNCOMPRESSED_CODEC is enabled, heif_context_add_image_tile() accepts an independently constructed tile whose component-plane dimensions do not match the tile geometry established by the prototype image. ImageItem_uncompressed::add_image_tile() passes that tile directly to unc_encoder::encode_tile(), which lacked the check_component_sizes() gate and sizes its output from the configured tile geometry while copying the tile's actual component-plane dimensions. An oversized component plane can therefore make unc_encoder_component_interleave::encode_tile() copy attacker-controlled data beyond the heap output buffer. This issue is fixed in version 1.23.2.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/strukturag/libheif/commit/e65071f59a1ac08aa1eb0d07a831deaf6bb
- https://github.com/strukturag/libheif/releases/tag/v1.23.2
- https://github.com/strukturag/libheif/security/advisories/GHSA-j264-xvrp-5v7q
FAQ
What is CVE-2026-84444?
CVE-2026-84444 is a vulnerability with a CVSS score of 7.4 (HIGH). libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, when WITH_UNCOMPRESSED_CODEC is enabled, heif_context_add_image_tile() accepts an independently constructed tile whose comp...
How severe is CVE-2026-84444?
CVE-2026-84444 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-84444?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.