CVE-2026-22047: iccDEV Buffer Overflow Vulnerability

CVE-2026-22047 Overview

CVE-2026-22047 is a heap-buffer-overflow vulnerability affecting the iccDEV library, which provides tools and libraries for interacting with, manipulating, and applying International Color Consortium (ICC) color management profiles. The vulnerability exists in the SIccCalcOp::Describe() function located in IccProfLib/IccMpeCalc.cpp. When processing specially crafted ICC color profiles, the vulnerable function can be exploited to cause a heap buffer overflow, potentially leading to code execution or denial of service.

Critical Impact

Attackers can exploit this heap buffer overflow to potentially execute arbitrary code or crash applications that process malicious ICC color profiles. All users of the iccDEV library processing untrusted color profiles are at risk.

Affected Products

• iccDEV library versions prior to 2.3.1.2
• Applications using vulnerable versions of IccProfLib
• Systems processing ICC color profiles through vulnerable iccDEV components

Discovery Timeline

• 2026-01-07 - CVE CVE-2026-22047 published to NVD
• 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2026-22047

Vulnerability Analysis

This heap buffer overflow vulnerability stems from improper input validation (CWE-20) when the iccDEV library processes ICC color profiles. The SIccCalcOp::Describe() function in IccProfLib/IccMpeCalc.cpp fails to properly validate buffer boundaries when describing calculator operations within ICC profile elements. When a maliciously crafted ICC profile is processed, the function can write beyond allocated heap memory boundaries.

The vulnerability requires user interaction to exploit, as the victim must open or process a malicious ICC color profile. However, the attack vector is network-based, meaning attackers can deliver malicious profiles through web downloads, email attachments, or embedded in documents and images.

Successful exploitation could allow an attacker to achieve arbitrary code execution within the context of the application processing the malicious profile, or cause a denial of service through application crashes.

Root Cause

The root cause of this vulnerability is improper input validation (CWE-20) within the SIccCalcOp::Describe() function. The function does not adequately validate the size and structure of input data from ICC color profiles before performing memory operations. This allows crafted profiles containing oversized or malformed calculator operation descriptions to trigger writes beyond the allocated heap buffer boundaries.

Attack Vector

The attack vector for CVE-2026-22047 is network-based and requires user interaction. An attacker can craft a malicious ICC color profile that, when processed by an application using a vulnerable version of the iccDEV library, triggers the heap buffer overflow. Attack scenarios include:

1. Embedding malicious ICC profiles in image files distributed via web or email
2. Serving malicious profiles through compromised or attacker-controlled websites
3. Including malformed profiles in document formats that support color management
4. Targeting color management workflows in printing or graphics applications

The vulnerability manifests when the SIccCalcOp::Describe() function in IccProfLib/IccMpeCalc.cpp processes the malformed profile data. For technical details on the specific exploitation mechanism, refer to the GitHub Security Advisory GHSA-22q7-8347-79m5.

Detection Methods for CVE-2026-22047

Indicators of Compromise

• Unexpected application crashes when processing ICC color profiles
• Memory corruption errors or segmentation faults in applications using iccDEV
• Anomalous heap allocations or memory access patterns in color management processes
• Crash dumps showing failures originating from IccMpeCalc.cpp or SIccCalcOp::Describe()

Detection Strategies

• Monitor for unusual crashes in applications that process ICC color profiles
• Implement file integrity monitoring for ICC profile files in sensitive directories
• Deploy memory protection mechanisms such as ASLR and DEP to detect exploitation attempts
• Use application sandboxing to contain potential exploitation of color management libraries

Monitoring Recommendations

• Enable enhanced logging for applications processing ICC color profiles
• Monitor for suspicious network downloads of .icc or .icm files
• Implement endpoint detection for heap corruption and buffer overflow attempts
• Track version information of iccDEV library deployments across the environment

How to Mitigate CVE-2026-22047

Immediate Actions Required

• Upgrade iccDEV library to version 2.3.1.2 or later immediately
• Audit applications in your environment that utilize the iccDEV library
• Restrict processing of ICC color profiles from untrusted sources until patched
• Implement network-level filtering for potentially malicious ICC profile files

Patch Information

The vulnerability has been patched in iccDEV version 2.3.1.2. Organizations should upgrade to this version or later to remediate the vulnerability. The fix was implemented through Pull Request #459 on GitHub. Additional technical details about the vulnerability can be found in GitHub Issue #454.

Workarounds

• No vendor-provided workarounds are available for this vulnerability
• Consider temporarily disabling ICC profile processing in affected applications until patching is complete
• Implement strict input validation at the application level before passing profiles to the iccDEV library
• Use application sandboxing to limit the impact of potential exploitation