{"id":"CVE-2026-84449","published":"2026-09-18T16:17:12.997","lastModified":"2026-09-22T15:17:19.207","description":"libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.19.6, Op_RGB24_32_to_YCbCr::convert_colorspace() stores image-plane strides in an integer width that can overflow for extremely large RGB images created through heif_image_create() and heif_image_add_plane(). The resulting wrapped stride causes the conversion loop in libheif/color-conversion/rgb2yuv.cc to compute an invalid input pointer and read beyond the allocated interleaved plane while heif_context_encode_image() performs RGB-to-YCbCr conversion. This can crash the encoding process. This issue is fixed in version 1.19.6.","cvssScore":3.7,"cvssSeverity":"LOW","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","cwes":["CWE-125","CWE-190"],"vendors":[],"products":[],"references":[{"url":"https://github.com/strukturag/libheif/commit/e29953da30eb11aa1762df0bff3b36be4b22fbe3","tags":[]},{"url":"https://github.com/strukturag/libheif/releases/tag/v1.19.6","tags":[]},{"url":"https://github.com/strukturag/libheif/security/advisories/GHSA-2c3g-p585-8rpq","tags":[]},{"url":"https://github.com/strukturag/libheif/security/advisories/GHSA-2c3g-p585-8rpq","tags":[]}],"exploitRefs":[{"url":"https://github.com/strukturag/libheif/commit/e29953da30eb11aa1762df0bff3b36be4b22fbe3","tags":[]},{"url":"https://github.com/strukturag/libheif/releases/tag/v1.19.6","tags":[]},{"url":"https://github.com/strukturag/libheif/security/advisories/GHSA-2c3g-p585-8rpq","tags":[]},{"url":"https://github.com/strukturag/libheif/security/advisories/GHSA-2c3g-p585-8rpq","tags":[]}],"hasPoc":true,"ai":null}