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CVE-2026-40386

Quick assessment

Affected
libexif project libexif
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.

Libexif是Libexif组织的一个使用C语言编写的函数库。该产品主要用于从图形文件中读写EXIF元信息。 libexif 0.6.25及之前版本存在数字错误漏洞，该漏洞源于Fuji和Olympus MakerNote解码中的大小检查存在整数下溢，可能导致攻击者使程序崩溃或泄露信息。

CVSS 4.0 · Medium EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2026-40386

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In libexif through 0.6.25, an integer underflow in size checking for Fuji and Olympus MakerNote decoding could be used by attackers to crash or leak information out of libexif-using programs.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
整数下溢(超界折返)
Source: CVE Program / CVE List V5
Vulnerability Title
Libexif 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Libexif是Libexif组织的一个使用C语言编写的函数库。该产品主要用于从图形文件中读写EXIF元信息。 libexif 0.6.25及之前版本存在数字错误漏洞，该漏洞源于Fuji和Olympus MakerNote解码中的大小检查存在整数下溢，可能导致攻击者使程序崩溃或泄露信息。
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
libexif project libexif 0 ~ 0.6.25 -

II. Public POCs for CVE-2026-40386

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III. Intelligence Information for CVE-2026-40386

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IV. Related Vulnerabilities

Same product: libexif
Same vendor: libexif project
Same weakness: CWE-191

V. Comments for CVE-2026-40386

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