SB2026041446 - Multiple vulnerabilities in libexif

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Main Vulnerability Database SB2026041446

SB2026041446 - Multiple vulnerabilities in libexif

Published: April 14, 2026 Updated: September 20, 2026

Security Bulletin ID SB2026041446
CSH Severity
High
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

High 75% Medium 25%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) Buffer Over-read (CVE-ID: CVE-2026-40385)

CWE-ID: CWE-126 - Buffer over-read

CVSSv4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service or disclose sensitive information.

The vulnerability exists due to buffer over-read in Nikon MakerNotes processing when decoding or displaying Exif data with MakerNotes on 32-bit systems. A remote attacker can supply specially crafted Exif data to cause a denial of service or disclose sensitive information.

Only 32-bit systems are affected.


2) Out-of-bounds read (CVE-ID: CVE-2026-40386)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to out-of-bounds read in Olympus and Fuji MakerNotes decoders when parsing EXIF data. A remote attacker can supply specially crafted EXIF data to cause a denial of service.


3) Integer overflow (CVE-ID: N/A)

CWE-ID: CWE-190 - Integer overflow

CVSSv4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to read heap memory out of bounds.

The vulnerability exists due to an integer overflow in exif_data_load_data_entry() when parsing a crafted IFD entry in a large EXIF metadata buffer supplied directly to libexif. A remote attacker can provide a crafted metadata buffer with a large components value to read heap memory out of bounds.

The common JPEG-embedded EXIF extraction path is not affected.


4) Uncontrolled Recursion (CVE-ID: N/A)

CWE-ID: CWE-674 - Uncontrolled Recursion

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled recursion in exif_data_load_data_content() when parsing crafted EXIF data. A remote attacker can supply a specially crafted JPEG file to cause a denial of service.

The issue affects file, memory-buffer, and streaming EXIF loading interfaces.


Remediation

Install update from vendor's website.

References