PT-2026-49255 · Julia · Libheif Jll

Published 2026-06-05 · Updated 2026-06-05

OSV

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

Fix

Related Identifiers

JLSEC-2026-572

Affected Products

Libheif Jll

References · 3

• https://osv.dev/vulnerability/JLSEC-2026-572 · Vendor Advisory
• https://github.com/strukturag/libheif/security/advisories/GHSA-frfr-f3vg-2g6j · Note
• https://github.com/strukturag/libheif/releases/tag/v1.22.0 · Note