This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-47247 →

DEBIAN-CVE-2026-47247

libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.0, two bugs in libheif chain to leak process heap memory as visible...

Original description

The description as published by the source.

libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.0, two bugs in libheif chain to leak process heap memory as visible pixel values in decoded grid images. An attacker who uploads a crafted AVIF/HEIC file to any server-side image processor (WordPress, Sharp/libvips, ImageMagick, etc.) can recover heap data - including library function pointers sufficient to defeat ASLR, or any other secret - from the publicly-downloadable transcoded JPEG/PNG/WebP output. Local attack vectors are also possible. Version 1.22.0 fixes the issue.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 libheif

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 libheif

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.19.8-1+deb13u1"}]}]

Debian:14 libheif

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.23.1-1"}]}]

References

advisory security-tracker.debian.org