CVE-2025-68431
Last modified
CVE-2025-68431 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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()`. EPSS estimates a 0.27% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Struktur | Libheif | < 1.21.0 |
References
- https://github.com/strukturag/libheif/releases/tag/v1.21.0Product, Release Notes
- https://github.com/strukturag/libheif/security/advisories/GHSA-j87x-4gmq-cqfqExploit, Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2025-68431?
How severe is CVE-2025-68431?
How do I fix CVE-2025-68431?
Are you affected by CVE-2025-68431?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST