VULNERABILITY INTELLIGENCE

CVE-2025-68431

CVSS score6.5 MEDIUM
EPSS probability0.43%
CISA KEVNot currently listed
Published2025-12-29
Last modified2026-10-07
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Description

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.

Weakness classification

  • security-advisories@github.com: CWE-125

Primary references