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CVE-2025-68431— libheif has Potential Heap Buffer Over-Read

Quick assessment

Affected
strukturag libheif
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

libheif是struktur开源的一款 ISO/IEC 23008-12:2017 HEIF 文件格式解码器和编码器。 libheif 1.21.0之前版本存在输入验证错误漏洞，该漏洞源于特制HEIF文件触发堆缓冲区过度读取，可能导致崩溃。

CVSS 6.5 · Medium EPSS 0.43% · P35

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2025-68431

Vulnerability Information
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Vulnerability Title
libheif has Potential Heap Buffer Over-Read
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
libheif 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libheif是struktur开源的一款 ISO/IEC 23008-12:2017 HEIF 文件格式解码器和编码器。 libheif 1.21.0之前版本存在输入验证错误漏洞，该漏洞源于特制HEIF文件触发堆缓冲区过度读取，可能导致崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
strukturag libheif < 1.21.0 -

II. Public POCs for CVE-2025-68431

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III. Intelligence Information for CVE-2025-68431

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Patches & Fixes for CVE-2025-68431 (1)

Vendor Advisories for CVE-2025-68431 (1)

Other References for CVE-2025-68431 (1)

IV. Related Vulnerabilities

Same product: libheif
Same vendor: strukturag
Same weakness: CWE-125

V. Comments for CVE-2025-68431

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