CVE-2026-31795: iccDEV Buffer Overflow Vulnerability

CVE-2026-31795 Overview

CVE-2026-31795 is a stack buffer overflow vulnerability in iccDEV, a library and toolset for working with ICC color management profiles. Prior to version 2.3.1.5, a stack buffer overflow write exists in the CIccXform3DLut::Apply() function, which can corrupt stack memory or cause application crashes. This vulnerability has been addressed in version 2.3.1.5.

Critical Impact

Successful exploitation could allow an attacker to corrupt stack memory, potentially leading to code execution or denial of service through application crashes when processing maliciously crafted ICC color profiles.

Affected Products

• iccDEV versions prior to 2.3.1.5
• Applications and systems utilizing the iccDEV library for ICC color profile processing

Discovery Timeline

• 2026-03-10 - CVE-2026-31795 published to NVD
• 2026-03-11 - Last updated in NVD database

Technical Details for CVE-2026-31795

Vulnerability Analysis

This vulnerability is classified as CWE-120 (Buffer Copy without Checking Size of Input), commonly known as a classic buffer overflow. The flaw resides in the CIccXform3DLut::Apply() function within the iccDEV library, which handles 3D lookup table transformations for color management operations.

When the function processes certain input data, it fails to properly validate the size of data being written to a stack-allocated buffer. This oversight allows data to overflow beyond the intended buffer boundaries, corrupting adjacent stack memory. The local attack vector requires user interaction, meaning an attacker would need to convince a user to open or process a maliciously crafted ICC color profile file.

Root Cause

The root cause is insufficient bounds checking in the CIccXform3DLut::Apply() function when copying or processing data into a fixed-size stack buffer. The function does not adequately verify that the input data size fits within the allocated buffer space before performing the copy operation, allowing an overflow condition to occur.

Attack Vector

The attack requires local access and user interaction. An attacker could craft a malicious ICC color profile file that, when processed by an application using the vulnerable iccDEV library, triggers the buffer overflow in CIccXform3DLut::Apply(). This could be achieved by:

1. Creating a specially crafted ICC profile with oversized or malformed 3D LUT data
2. Distributing the malicious file through social engineering (email attachments, file sharing, etc.)
3. When a victim opens or processes the file with vulnerable software, the overflow corrupts stack memory
4. Depending on the corrupted data, this may result in application crashes or potentially arbitrary code execution

The vulnerability manifests during the color transformation process when applying 3D lookup tables. For detailed technical information about the specific implementation flaw and the fix, refer to the GitHub Issue Discussion and GitHub Pull Request.

Detection Methods for CVE-2026-31795

Indicators of Compromise

• Unexpected crashes in applications using iccDEV library during ICC profile processing
• Stack corruption errors or segmentation faults when handling color profile files
• Unusual ICC profile files with abnormally large 3D LUT data sections
• Memory access violations in processes utilizing color management functions

Detection Strategies

• Monitor for applications loading iccDEV library versions prior to 2.3.1.5
• Implement file integrity monitoring for incoming ICC profile files (.icc, .icm extensions)
• Deploy endpoint detection solutions capable of identifying stack buffer overflow exploitation attempts
• Use application whitelisting to control which applications can process ICC color profiles

Monitoring Recommendations

• Enable crash dump collection and analysis for applications using color management libraries
• Implement logging for ICC profile processing operations in critical applications
• Monitor for unusual memory allocation patterns in color management processes
• Set up alerts for repeated application crashes related to color profile handling

How to Mitigate CVE-2026-31795

Immediate Actions Required

• Upgrade iccDEV to version 2.3.1.5 or later immediately
• Identify all applications and systems that depend on the iccDEV library
• Temporarily disable or restrict ICC profile processing in untrusted contexts until patching is complete
• Implement input validation for ICC profile files before processing

Patch Information

The vulnerability has been fixed in iccDEV version 2.3.1.5. The patch addresses the buffer overflow by implementing proper bounds checking in the CIccXform3DLut::Apply() function. Organizations should update to this version or later to remediate the vulnerability.

For complete patch details, refer to:

• GitHub Security Advisory GHSA-wh5x-j6pq-pr3c
• GitHub Release Version 2.3.1.5

Workarounds

• Restrict processing of ICC profiles to only trusted sources until the patch can be applied
• Implement application-level sandboxing for color management operations
• Use operating system-level protections such as ASLR and stack canaries to reduce exploitation impact
• Consider implementing file validation to reject malformed or suspicious ICC profile files before processing

# Verify iccDEV version after upgrade
# Check library version to confirm patch installation
iccDumpProfile --version
# Expected output should show version 2.3.1.5 or later