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CVE-2025-68431
Good to know:
Date: December 29, 2025
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.
Severity Score
Related Resources (5)
Severity Score
Top Fix
CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | LOW |
| Privileges Required (PR): | NONE |
| User Interaction (UI): | REQUIRED |
| Scope (S): | UNCHANGED |
| Confidentiality (C): | NONE |
| Integrity (I): | NONE |
| Availability (A): | HIGH |