CVE-2026-48029

libheif: heap OOB read in ImageItem_Grid::decode_grid_tile via irot-induced tile-coordinate underflow

State: Published
Severity: 7.1 High
Published: Jul 22, 2026
Updated: Jul 22, 2026
Reserved: May 20, 2026

Description

libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.19.0 through 1.21.2 have a heap OOB read in ImageItem_Grid::decode_grid_tile via irot-induced tile-coordinate underflow. Version 1.22.0 fixes the issue.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H	GitHub_M

Weaknesses

CWE-125 Out-of-bounds Read
CWE-191 Integer Underflow (Wrap or Wraparound)

Affected Products

Product	Versions
libheifstrukturag	>= 1.19.0, < 1.22.0Affected

References

https://github.com/strukturag/libheif/security/advisories/GHSA-6x5f-qchq-cxqv
https://github.com/strukturag/libheif/commit/e523ec0bf379110b7c33d4c159f8b1202d332157

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