Copyright © 2012 Red Hat, Inc. All rights reserved. Important 2026-05-19T19:22:07 libheif: libheif: Arbitrary code execution or denial of service via crafted HEIF/AVIF file 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CWE-787

libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.21.2 and prior contain a heap-buffer-overflow (write) vulnerability in the grid tile compositing, allowing an attacker to write 64 bytes of fully attacker-controlled data past the end of a chroma plane heap allocation by crafting a HEIF/AVIF file with a 1×4 grid of odd-height tiles. The overflow is triggered during normal image decoding with default build configuration. The written bytes are chroma (Cb/Cr) pixel values from the attacking tile, giving the attacker full control over the overflow content. This issue has been fixed in version 1.22.0.

A flaw was found in libheif, a library for decoding and encoding HEIF and AVIF image files. This heap-buffer-overflow vulnerability allows a remote attacker to write arbitrary data beyond the intended memory boundary. By crafting a malicious HEIF/AVIF file with a specific grid tile configuration, an attacker could potentially achieve arbitrary code execution or cause a denial of service.

Red Hat Enterprise Linux 10 Not affected glycin-loaders https://www.cve.org/CVERecord?id=CVE-2026-32740 https://nvd.nist.gov/vuln/detail/CVE-2026-32740 https://github.com/strukturag/libheif/releases/tag/v1.22.0 https://github.com/strukturag/libheif/security/advisories/GHSA-frfr-f3vg-2g6j