23 Oct 2026 15:48:27 UTC
libheif uncompressed tiled image encoding allows out-of-bounds write
cve-program · CVE-2026-84444 · Published
CVE-2026-84444
libheif uncompressed tiled image encoding allows out-of-bounds write
CVSS 3.1 7.4 HIGHCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-84444
Publishedlibheif 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.
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