CVE-2026-24403: iccDEV ICC Profile RCE Vulnerability

CVE-2026-24403 Overview

CVE-2026-24403 is an integer overflow vulnerability affecting iccDEV, a popular library and toolset for interacting with, manipulating, and applying ICC color management profiles. The vulnerability exists in the icValidateStatus CIccProfile::CheckHeader() function when user-controllable input is incorporated into profile data unsafely. By tampering with tag tables, offsets, or size fields, attackers can trigger parsing errors, memory corruption, or denial of service conditions, potentially enabling arbitrary code execution or bypassing application logic.

This vulnerability is particularly concerning because ICC color profiles are commonly processed by image editing software, document viewers, print management systems, and web browsers, creating a wide attack surface for malicious actors.

Critical Impact

Successful exploitation could lead to memory corruption, denial of service, or arbitrary code execution in applications that process maliciously crafted ICC color profiles.

Affected Products

• iccDEV versions 2.3.1.1 and below
• Applications and libraries utilizing vulnerable iccDEV components
• Systems processing untrusted ICC color profiles through iccDEV

Discovery Timeline

• 2026-01-24 - CVE-2026-24403 published to NVD
• 2026-01-26 - Last updated in NVD database

Technical Details for CVE-2026-24403

Vulnerability Analysis

The integer overflow vulnerability in CVE-2026-24403 resides in the header validation logic of the CIccProfile::CheckHeader() function. When processing ICC color profile data, this function fails to properly validate user-controllable size fields and offsets within the profile structure before performing arithmetic operations.

ICC color profiles contain tag tables that describe various color transformation parameters. Each tag entry includes offset and size values that specify where the corresponding data resides within the file. The vulnerability manifests when an attacker crafts a malicious ICC profile with manipulated tag table entries containing size or offset values specifically designed to cause integer overflow during internal calculations.

When the overflow occurs, the resulting truncated values can lead to buffer allocations smaller than expected, subsequent out-of-bounds memory access, heap corruption, or other memory safety violations. This creates conditions that may be exploitable for arbitrary code execution in the context of the vulnerable application.

Root Cause

The root cause is improper input validation (CWE-20) in the ICC profile header parsing logic. The CheckHeader() function performs arithmetic operations on user-supplied size and offset values without adequate bounds checking to prevent integer overflow conditions. When profile data contains values near integer boundary limits, mathematical operations such as addition or multiplication can wrap around, producing unexpectedly small values that bypass subsequent allocation size checks.

Attack Vector

Exploitation requires an attacker to craft a malicious ICC color profile and deliver it to a victim's system where it will be processed by an application using vulnerable versions of iccDEV. The attack vector is network-based (AV:N) with low attack complexity (AC:L), requiring no privileges but user interaction to open or process the malicious file.

Attack scenarios include:

1. Document-based attacks: Embedding a malicious ICC profile within image files (JPEG, PNG, TIFF) or documents (PDF) that are then shared via email, messaging, or file sharing platforms
2. Web-based attacks: Hosting malicious content on compromised or attacker-controlled websites where victim browsers or plugins process the ICC profile
3. Print workflow attacks: Injecting malicious profiles into print production pipelines or color management systems

The attacker manipulates tag table entries in the ICC profile header to include carefully calculated offset and size values that, when processed arithmetically by CheckHeader(), result in integer overflow. This leads to improper memory operations that can cause denial of service through application crashes, or potentially arbitrary code execution if the memory corruption can be reliably controlled.

Detection Methods for CVE-2026-24403

Indicators of Compromise

• Unexpected crashes or segmentation faults in applications processing ICC color profiles
• Unusual ICC profile files with abnormally large size or offset values in tag tables
• Memory access violation errors in logs related to color management or image processing functions
• Application hangs or resource exhaustion when opening certain image files or documents

Detection Strategies

• Deploy file integrity monitoring on systems processing color-managed content to detect anomalous ICC profile modifications
• Implement application-level logging for ICC profile parsing operations to capture error conditions
• Use memory protection mechanisms (ASLR, DEP/NX) to make exploitation more difficult and trigger detectable crashes
• Monitor for unusual process behavior patterns in applications known to use iccDEV libraries

Monitoring Recommendations

• Enable verbose logging in applications that process ICC color profiles to capture parsing errors
• Monitor endpoint detection and response (EDR) telemetry for memory corruption indicators in image processing workflows
• Configure crash dump collection and analysis for applications using iccDEV to identify exploitation attempts
• Review security event logs for repeated application failures associated with color profile processing

How to Mitigate CVE-2026-24403

Immediate Actions Required

• Update iccDEV to version 2.3.1.2 or later, which contains the fix for this vulnerability
• Audit applications and dependencies to identify all instances of iccDEV library usage
• Implement file validation and sanitization for ICC color profiles from untrusted sources
• Consider disabling ICC profile processing in non-essential applications until patching is complete

Patch Information

The vulnerability has been addressed in iccDEV version 2.3.1.2. The fix implements proper bounds checking and validation of size and offset fields in ICC profile headers before performing arithmetic operations, preventing integer overflow conditions.

For detailed information about the patch, refer to:

• GitHub Security Advisory GHSA-ph33-qp8j-5q34
• GitHub Issue #505 Discussion
• GitHub Commit Changes

Workarounds

• Restrict processing of ICC color profiles to trusted sources only until patching is possible
• Implement application sandboxing or containerization to limit the impact of potential exploitation
• Deploy network-level filtering to block suspicious files containing embedded ICC profiles from untrusted origins
• Use memory-safe compilation flags and runtime protections where available to harden applications against memory corruption

# Verify iccDEV version to confirm patched status
# Check library version in your installation
strings /usr/lib/libicc.so | grep -i version

# For systems using package managers, verify installed version
# Example for systems with iccDEV packaged:
dpkg -l | grep iccdev
rpm -qa | grep iccdev

# Update to patched version 2.3.1.2 or later
# Follow vendor-specific update procedures for your distribution