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MEDIUM · 4.0

CVE-2026-40386

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.

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.

CVSS Score

4.0

MEDIUM

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
LOW

Affected Products

VendorProductVersions
Libexif ProjectLibexif<= 0.6.25

Related Weaknesses (CWE)

CWE-191

References

FAQ

What is CVE-2026-40386?

CVE-2026-40386 is a vulnerability with a CVSS score of 4.0 (MEDIUM). 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.

How severe is CVE-2026-40386?

CVE-2026-40386 has been rated MEDIUM with a CVSS base score of 4.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-40386?

Check the references section above for vendor advisories and patch information. Affected products include: Libexif Project Libexif.