CVE-2026-21498 – A NULL pointer dereference vulnerability exists... (How to Fix)

Q: What is the severity of CVE-2026-21498?

CVE-2026-21498 has a CVSS score of 5.5 (MEDIUM). A NULL pointer dereference vulnerability exists in iccDEV's XML calculator parser before version 2.3.1.2. This vulnerability could cause application crashes or denial of service when processing malicious ICC color profiles. Users and applications that utilize iccDEV libraries for color management are affected.

📋 TL;DR

A NULL pointer dereference vulnerability exists in iccDEV's XML calculator parser before version 2.3.1.2. This vulnerability could cause application crashes or denial of service when processing malicious ICC color profiles. Users and applications that utilize iccDEV libraries for color management are affected.

💻 Affected Systems

Products:

iccDEV library and tools

Versions: All versions prior to 2.3.1.2

Operating Systems: All platforms where iccDEV is installed

Default Config Vulnerable: ⚠️ Yes

Notes: Any application or tool using iccDEV libraries to parse ICC color profiles is vulnerable.

📦 What is this software?

Iccdev by Color

View all CVEs affecting Iccdev →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Application crash leading to denial of service, potentially disrupting color-critical workflows in design, printing, or imaging applications.

🟠

Likely Case

Application instability or crashes when processing specially crafted ICC color profiles, causing workflow interruptions.

🟢

If Mitigated

Minimal impact with proper input validation and updated software, maintaining normal color management functionality.

🌐 Internet-Facing: LOW - This is primarily a library vulnerability affecting applications that process ICC profiles, not typically directly internet-exposed.

🏢 Internal Only: MEDIUM - Applications using iccDEV internally could experience crashes affecting business processes involving color management.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Exploitation requires feeding a malicious ICC profile to the vulnerable parser, which could be done through normal file processing operations.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 2.3.1.2

Vendor Advisory: https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-6822-qvxq-m736

Restart Required: Yes

Instructions:

1. Download iccDEV version 2.3.1.2 or later from the official repository. 2. Replace existing iccDEV installation with the updated version. 3. Restart any applications or services using iccDEV libraries.

🔧 Temporary Workarounds

Input Validation

all

Implement strict validation of ICC profile files before processing with iccDEV

Process Isolation

all

Run iccDEV operations in isolated processes to contain crashes

🧯 If You Can't Patch

Restrict processing of untrusted ICC profiles to minimize exposure
Implement monitoring for application crashes related to color profile processing

🔍 How to Verify

Check if Vulnerable:

Check iccDEV version using 'iccdev --version' or examine installed package version

Check Version:

iccdev --version

Verify Fix Applied:

Confirm version is 2.3.1.2 or higher and test with known ICC profile processing

📡 Detection & Monitoring

Log Indicators:

Application crashes or segmentation faults during ICC profile processing
Error messages containing 'NULL pointer' or 'segmentation fault' in iccDEV context

SIEM Query:

source="application_logs" AND ("segmentation fault" OR "NULL pointer" OR "iccdev")

📊 Metadata

CVE ID: CVE-2026-21498

CVSS v3 Score: 5.5 (MEDIUM)

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CWE: CWE-20

EPSS Score: 0.02% exploit probability (4.3th percentile)

Published: January 7, 2026

Last Updated: January 9, 2026

🔗 References

https://github.com/InternationalColorConsortium/iccDEV/commit/75f124f40ba45491211cb4b67f0e05b7c7d59553 Patch
https://github.com/InternationalColorConsortium/iccDEV/commit/bdfa31940726aaabb0a6f19194d9062ba0598959 Patch
https://github.com/InternationalColorConsortium/iccDEV/issues/375 Exploit,Issue Tracking
https://github.com/InternationalColorConsortium/iccDEV/pull/404 Issue Tracking
https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-6822-qvxq-m736 Third Party Advisory

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