CVE-2026-21682
Unknown Unknown - Not Provided
Heap Buffer Overflow in iccDEV ICC Profile Parsing (Pre

Publication date: 2026-01-07

Last updated on: 2026-01-07

Assigner: GitHub, Inc.

Description
iccDEV provides a set of libraries and tools that allow for the interaction, manipulation, and application of International Color Consortium (ICC) color management profiles. Versions prior to 2.3.1.2 have a heap-buffer-overflow in `CIccXmlArrayType::ParseText()`. This vulnerability affects users of the iccDEV library who process ICC color profiles. Version 2.3.1.2 contains a patch. No known workarounds are available.
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Meta Information
Published
2026-01-07
Last Modified
2026-01-07
Generated
2026-06-16
AI Q&A
2026-01-07
EPSS Evaluated
2026-06-15
NVD
CVE-2026-21682
EUVD
EUVD-2026-1397
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
international_color_consortium iccdev to 2.3.1.1 (exc)
international_color_consortium iccdev 2.3.1.2
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-20 The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
CWE-122 A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
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Executive Summary

CVE-2026-21682 is a heap-buffer-overflow vulnerability in the iccDEV library, specifically in the function CIccXmlArrayType::ParseText(). The function parses text input to convert it into numeric arrays but fails to properly check buffer boundaries when processing the last number in the input. This off-by-one error causes the function to write beyond the allocated heap buffer, leading to memory corruption. The vulnerability arises from improper input validation and can be triggered by maliciously crafted ICC profile XML data. [1, 2, 3]

Impact Analysis

This vulnerability can lead to memory corruption, causing application crashes or potentially allowing an attacker to execute arbitrary code. Because the iccDEV library is used to process ICC color profiles, an attacker could exploit this flaw by supplying specially crafted ICC profile data. The CVSS score is 8.8 (High), indicating that exploitation can result in high impacts on confidentiality, integrity, and availability. Successful exploitation could lead to data breaches, data manipulation, or denial of service. [1, 2, 3]

Detection Guidance

This vulnerability can be detected by using memory safety tools such as Clang's AddressSanitizer (ASan) or fil-c, which report heap-buffer-overflow errors when the vulnerable function `CIccXmlArrayType::ParseText()` processes crafted ICC profile XML data. Running tests that parse ICC profiles with these sanitizers enabled can reveal the overflow. Specific commands would involve building the iccDEV project with ASan enabled and running profile parsing tests to observe any heap-buffer-overflow reports. For example, compiling with `-fsanitize=address` and executing the test suite or profile parsing commands can detect the issue. [2]

Mitigation Strategies

The immediate mitigation step is to upgrade the iccDEV library to version 2.3.1.2 or later, where the vulnerability has been patched. The patch fixes the heap-buffer-overflow by adding proper boundary checks in the `CIccXmlArrayType::ParseText()` function to prevent out-of-bounds writes. No other workarounds are available, so updating to the fixed version is necessary to mitigate the risk. [3, 1]

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