CVE-2026-62291

A flaw was found in libheif, a library for decoding and encoding HEIF and AVIF image formats. A remote attacker could exploit this vulnerability by providing a specially crafted image sequence with mismatched auxiliary alpha dimensions. During the image processing workflow, this could lead to...

CVE-2026-62291 libheif: Heap out of bounds write in libheif uncompressed encoder when writing images with mismatched auxiliary alpha dimensions

libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.0 and earlier, a crafted image sequence with a 2x2 primary plane and a 256x256 auxiliary alpha plane can cause attacker-controlled heap corruption during a normal decode and re-encode workflow. TrackVisual::decodenextimagesample...