CVE-2026-22255: iccDEV Buffer Overflow Vulnerability

CVE-2026-22255 Overview

CVE-2026-22255 is a heap-buffer-overflow vulnerability affecting the iccDEV library, a set of tools and libraries used for interaction, manipulation, and application of International Color Consortium (ICC) color management profiles. The vulnerability exists in the CIccCLUT::Init() function located in IccProfLib/IccTagLut.cpp. This flaw impacts users who process ICC color profiles using vulnerable versions of the iccDEV library.

Critical Impact

Remote attackers can potentially achieve code execution or cause denial of service by crafting malicious ICC color profiles that trigger the heap-buffer-overflow when processed by applications using vulnerable iccDEV library versions.

Affected Products

• iccDEV library versions prior to 2.3.1.2
• Applications and software utilizing vulnerable iccDEV library versions for ICC profile processing
• Systems processing untrusted ICC color profile files

Discovery Timeline

• January 8, 2026 - CVE-2026-22255 published to NVD
• January 8, 2026 - Last updated in NVD database

Technical Details for CVE-2026-22255

Vulnerability Analysis

This vulnerability is classified as CWE-20 (Improper Input Validation), manifesting as a heap-buffer-overflow condition. The flaw occurs within the CIccCLUT::Init() function in the IccProfLib/IccTagLut.cpp source file. When the library processes specially crafted ICC color profiles, insufficient validation of input parameters can lead to memory corruption on the heap.

The network attack vector indicates that exploitation can occur when a user opens or processes a malicious ICC profile received from a remote source. User interaction is required, typically involving opening a document or image containing an embedded malicious ICC profile. Successful exploitation can result in high impacts to confidentiality, integrity, and availability of the affected system.

Root Cause

The root cause stems from improper input validation in the Color Lookup Table (CLUT) initialization routine. The CIccCLUT::Init() function fails to properly validate buffer boundaries when initializing color lookup table structures from ICC profile data. This allows attackers to craft ICC profiles with malformed CLUT data that causes the library to write beyond allocated heap buffer boundaries.

Attack Vector

Exploitation requires an attacker to craft a malicious ICC color profile containing specially formatted CLUT data designed to trigger the overflow condition. The attack vector is network-based, meaning the malicious profile can be delivered through various channels:

The malicious ICC profile can be embedded within image files, documents, or delivered as standalone .icc or .icm files. When a vulnerable application using the iccDEV library attempts to parse and apply the color profile, the CIccCLUT::Init() function processes the malformed data without adequate bounds checking. This causes a heap-buffer-overflow that can corrupt adjacent memory structures, potentially allowing an attacker to achieve arbitrary code execution or cause application crashes resulting in denial of service.

For detailed technical information about the vulnerability mechanism, see the GitHub Security Advisory GHSA-qv2w-mq3g-73gv and GitHub Issue #466.

Detection Methods for CVE-2026-22255

Indicators of Compromise

• Application crashes or unexpected termination when processing ICC color profile files
• Memory corruption errors or heap-related exceptions in applications using iccDEV library
• Unusual ICC profile files with abnormally large or malformed CLUT data sections
• Crash dumps indicating failures within CIccCLUT::Init() or IccTagLut.cpp components

Detection Strategies

• Implement application-level monitoring for crashes or exceptions in ICC profile processing routines
• Deploy endpoint detection solutions capable of identifying heap overflow exploitation attempts
• Monitor for suspicious ICC profile files with unusual file characteristics or sizes
• Use memory-safe build options and AddressSanitizer during development to identify overflow conditions

Monitoring Recommendations

• Enable heap corruption detection features in operating system and runtime environments
• Log and alert on application crashes related to color management or ICC profile processing
• Implement file integrity monitoring for ICC profile directories in production environments
• Review application logs for repeated failures when processing specific ICC profile files

How to Mitigate CVE-2026-22255

Immediate Actions Required

• Upgrade iccDEV library to version 2.3.1.2 or later immediately
• Audit applications and systems for usage of vulnerable iccDEV library versions
• Restrict processing of ICC profiles from untrusted sources until patching is complete
• Implement network-level filtering to block potentially malicious ICC profile files from external sources

Patch Information

The International Color Consortium has released version 2.3.1.2 of the iccDEV library which contains a patch for this vulnerability. The fix addresses the heap-buffer-overflow in the CIccCLUT::Init() function by implementing proper bounds checking for CLUT data during ICC profile parsing. The patch is available via GitHub Pull Request #469.

Organizations should prioritize updating to the patched version as no workarounds are available for this vulnerability. The update should be tested in a staging environment before deployment to production systems.

Workarounds

• No known workarounds are available for this vulnerability
• Temporary risk reduction may be achieved by disabling or restricting ICC profile processing from untrusted sources
• Consider implementing application sandboxing to limit the impact of potential exploitation
• Restrict file upload capabilities for ICC profile formats until patching is complete

# Verify installed iccDEV version and update
# Check current version in your build configuration
grep -r "iccDEV" CMakeLists.txt configure.ac Makefile

# Update to patched version 2.3.1.2 or later
git clone https://github.com/InternationalColorConsortium/iccDEV.git
cd iccDEV
git checkout v2.3.1.2