CVE-2026-24412: iccDEV Buffer Overflow Vulnerability

CVE-2026-24412 Overview

A heap buffer overflow vulnerability has been identified in iccDEV, a library and toolset for interacting with, manipulating, and applying ICC color management profiles. The vulnerability exists in the CIccTagXmlSegmentedCurve::ToXml() function in versions 2.3.1.1 and below. This flaw occurs when user-controllable input is unsafely incorporated into ICC profile data or other structured binary blobs, potentially allowing attackers to achieve code execution, data manipulation, denial of service, or bypass application logic.

Critical Impact
Successful exploitation of this heap buffer overflow may enable attackers to execute arbitrary code, cause denial of service, manipulate data, or bypass application logic through malicious ICC profile data.

Affected Products

iccDEV versions 2.3.1.1 and below
Applications and systems utilizing vulnerable iccDEV libraries for ICC profile processing
Software pipelines that process untrusted ICC color management profiles

Discovery Timeline

2026-01-24 - CVE CVE-2026-24412 published to NVD
2026-01-26 - Last updated in NVD database

Technical Details for CVE-2026-24412

Vulnerability Analysis

This vulnerability is classified as a heap buffer overflow (CWE-20: Improper Input Validation) within the ICC profile XML parsing and conversion functionality. The flaw manifests in the CIccTagXmlSegmentedCurve::ToXml() function where the library processes MCurves data during XML conversion operations.

The root issue stems from a logic error in how MCurves allocation sizes are calculated versus how they are subsequently read. When processing ICC profiles containing segmented curves, the library incorrectly determines the array size based on whether the profile uses an input or output matrix configuration. This mismatch between allocated buffer size and the amount of data written can result in heap memory corruption.

An attacker can craft a malicious ICC profile with specifically manipulated curve data that triggers the buffer overflow during XML conversion. Since ICC profiles are commonly embedded in images and documents, this creates a significant attack surface in applications that process user-supplied media files.

Root Cause

The vulnerability originates from improper input validation and a logical error in the icCurvesFromXml function call within the MCurves parsing code. The condition that determines whether to use nIn or nOut as the curve count was inverted, causing a mismatch between the allocated buffer size and the data being written.

Specifically, the condition !pMBB->IsInputMatrix() was incorrectly used when it should have been pMBB->IsInputMatrix(). This inversion causes the parser to allocate space for one dimension while populating data based on the other dimension, leading to a heap buffer overflow when the input and output dimensions differ.

Attack Vector

The attack is network-accessible and requires user interaction, typically involving a victim opening or processing a maliciously crafted ICC profile. Attack scenarios include:

Embedding a malicious ICC profile within an image file (JPEG, PNG, TIFF)
Distributing a standalone ICC profile for installation
Supplying malformed color profiles through web applications that process user uploads
Exploiting document processing systems that handle color-managed content

The following patch addresses the vulnerability by correcting the MCurves allocation logic:

cpp

       }
       else if (!icXmlStrCmp(pNode->name, "MCurves") && !pMBB->GetCurvesM()) {
         LPIccCurve *pCurves = pMBB->NewCurvesM();
-        if (!icCurvesFromXml(pCurves, !pMBB->IsInputMatrix() ? nIn : nOut, pNode->children, nType, parseStr)) {
+        if (!icCurvesFromXml(pCurves, pMBB->IsInputMatrix() ? nIn : nOut, pNode->children, nType, parseStr)) {
           parseStr += "Error! - Failed to parse MCurves.\n";
           return false;
         }

Source: GitHub Commit Reference

Detection Methods for CVE-2026-24412

Indicators of Compromise

Unexpected application crashes or segmentation faults when processing ICC profiles or color-managed documents
Memory corruption errors or heap overflow warnings in application logs during image or document processing
Unusual process behavior in applications utilizing iccDEV libraries
Core dumps indicating heap corruption in ICC profile parsing routines

Detection Strategies

Monitor for abnormal memory allocation patterns in processes using iccDEV libraries
Implement input validation checks for ICC profile structure before processing
Deploy runtime memory protection tools (AddressSanitizer, Valgrind) in development and testing environments
Use file integrity monitoring on systems that process ICC profiles from untrusted sources

Monitoring Recommendations

Enable detailed logging for applications that process ICC color profiles
Configure crash reporting and analysis for applications utilizing iccDEV
Implement anomaly detection for unusual file processing patterns or repeated parsing failures
Review system logs for evidence of exploitation attempts through malformed ICC profiles

How to Mitigate CVE-2026-24412

Immediate Actions Required

Update iccDEV to version 2.3.1.2 or later immediately
Audit systems to identify all applications and services utilizing vulnerable iccDEV versions
Restrict processing of ICC profiles from untrusted sources until patched
Implement application-level sandboxing for processes that handle user-supplied media files

Patch Information

The vulnerability has been addressed in iccDEV version 2.3.1.2. The fix corrects the logical condition in the MCurves parsing code within IccXML/IccLibXML/IccTagXml.cpp to ensure proper buffer allocation matching the actual data size.

For detailed patch information, refer to:

Workarounds

Validate ICC profile structures before processing using a separate validation library
Implement strict input size limits on ICC profile data accepted by applications
Run ICC profile processing in isolated sandboxed environments with limited privileges
Consider disabling XML-based ICC profile processing if not required for operations

bash

# Check installed iccDEV version
pkg-config --modversion iccDEV 2>/dev/null || echo "Version check: verify manually"

# Update to patched version (example using git)
git clone https://github.com/InternationalColorConsortium/iccDEV.git
cd iccDEV
git checkout v2.3.1.2
mkdir build && cd build
cmake ..
make && sudo make install