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CVE-2025-68431

đŸ”ļ medium
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Summary

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. A

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.

CVSS Score
6.5
Medium
EPSS Score
0.1
Exploit Probability
Published Date
2025-12-29
First Seen: 2026-01-05
📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 47.8% of all 326,604 vulnerabilities in our database.

#170,379
Below average severity
Severity Percentile
đŸŽ¯ CISA SSVC Assessment Updated: Dec 30, 2025
🔍 Exploitation Status
None
No known exploits
⚙ī¸ Automatable
NO
Requires human interaction
đŸ’Ĩ Technical Impact
Partial
Limited system impact
SSVC data provided by CISA
Last Modified 2026-02-25
Source NVD 🔗
CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE IDs (Weakness Types)
CWE-125 CWE-190

đŸ“Ļ Affected Products 1

Vendor Product Status Affected Versions
struktur libheif Affected
< 1.21.0

🔗 References 3

https://github.com/strukturag/libheif/commit/b8c12a7...
Patch
https://github.com/strukturag/libheif/releases/tag/v...
Product Release Notes
https://github.com/strukturag/libheif/security/advis...
Exploit Patch Vendor Advisory

🔗 Related CVEs 6

CVE ID Severity CVSS EPSS Summary Published
CVE-2026-41069 đŸ”ļ medium 6.5 0.0 libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, a malformed HEIF sequence file... 2026-05-22
CVE-2026-41071 ⚠ī¸ high 8.1 0.0 libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, a crafted HEIF sequence file w... 2026-05-22
CVE-2026-32738 đŸ”ļ medium 6.5 0.1 libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and below, a crafted 792-byte HEIF sequen... 2026-05-19
CVE-2026-32739 đŸ”ļ medium 6.5 0.1 libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and below, a crafted 800-byte HEIF sequen... 2026-05-19
CVE-2026-32740 ⚠ī¸ high 8.8 0.0 libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.21.2 and prior contain a heap-buffer-overflow (wr... 2026-05-19
CVE-2025-43966 ℹī¸ low 2.9 0.1 libheif before 1.19.6 has a NULL pointer dereference in ImageItem_iden in image-items/iden.cc. 2025-04-21
These CVEs affect the same products