{"id":"ALPINE-CVE-2025-68431","details":"libheif is an HEIF and AVIF file format decoder and encoder. Prior to version 1.21.0, a crafted HEIF that exercises the overlay image item path triggers a heap buffer over-read in `HeifPixelImage::overlay()`. The function computes a negative row length (likely from an unclipped overlay rectangle or invalid offsets), which then underflows when converted to `size_t` and is passed to `memcpy`, causing a very large read past the end of the source plane and a crash. Version 1.21.0 contains a patch. As a workaround, avoid decoding images using `iovl` overlay boxes.","modified":"2026-02-26T11:16:12.316245Z","published":"2025-12-29T19:15:56.933Z","upstream":["CVE-2025-68431"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2025-68431"}],"affected":[{"package":{"name":"libheif","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/libheif?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.21.2-r0"}]}],"versions":["1.11.0-r0","1.12.0-r0","1.12.0-r1","1.12.0-r2","1.13.0-r0","1.14.0-r0","1.14.2-r0","1.15.1-r0","1.15.2-r0","1.15.2-r1","1.15.2-r2","1.15.2-r3","1.16.1-r0","1.16.1-r1","1.16.2-r0","1.17.1-r0","1.17.3-r0","1.17.3-r1","1.17.6-r0","1.17.6-r1","1.18.0-r0","1.18.2-r0","1.19.2-r0","1.19.5-r0","1.19.7-r0","1.19.8-r0","1.20.1-r0","1.20.2-r0","1.20.2-r1","1.3.2-r0","1.3.2-r1","1.3.2-r2","1.4.0-r0","1.5.0-r0","1.5.0-r1","1.5.1-r0","1.5.1-r1","1.6.0-r0","1.6.1-r0","1.6.2-r0","1.6.2-r1","1.6.2-r2","1.7.0-r0","1.7.0-r1","1.9.1-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2025-68431.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H"}]}