CVE-2026-47178

CVE-2026-47178 affects libheif up to v1.21.2, where a crafted uncompressed HEIF image (unci codec, tiled, component-interleaved, 4:2:0) can trigger a heap out-of-bounds write in the uncompressed tile decoder. The write overwrites a nearby C++ vtable pointer, causing the next virtual call to dispa...

CVE-2026-47178 libheif has Heap Out Of Bounds Write in unci subsystem

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 o...