Heap Buffer Overflow in iccDEV icAnsiToUtf8 Causes Crash

Publication date: 2026-03-31

Last updated on: 2026-04-20

Assigner: GitHub, Inc.

Description

iccDEV provides a set of libraries and tools for working with ICC color management profiles. Prior to version 2.3.1.6, there is a heap-buffer-overflow (HBO) in icAnsiToUtf8() in the XML conversion path. The issue is triggered by a crafted ICC profile which causes icAnsiToUtf8(std::string&, char const*) to treat an input buffer as a C-string and call operations that rely on strlen()/null-termination. AddressSanitizer reports an out-of-bounds READ of size 115 past a 114-byte heap allocation, with the failure observed while running the iccToXml tool. This issue has been patched in version 2.3.1.6.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-03-31

Last Modified

2026-04-20

Generated

2026-07-06

AI Q&A

2026-04-01

EPSS Evaluated

2026-07-05

NVD

CVE-2026-34556

Affected Vendors & Products

Vendor	Product	Version / Range
color	iccdev	to 2.3.1.6 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability is a heap-buffer-overflow (HBO) in the icAnsiToUtf8() function within the iccDEV libraries and tools used for ICC color management profiles. It occurs when a specially crafted ICC profile causes the function to treat an input buffer as a C-string, leading to operations that rely on strlen() and null-termination reading beyond the allocated memory buffer. This results in an out-of-bounds read error.

Impact Analysis

The vulnerability can cause a heap-buffer-overflow which may lead to application crashes or undefined behavior when processing malicious ICC profiles. According to the CVSS score, it has a high impact on availability (A:H) but does not affect confidentiality or integrity. This means it can disrupt service or cause denial of service but does not directly lead to data leakage or modification.

Mitigation Strategies

To mitigate this vulnerability, update iccDEV to version 2.3.1.6 or later, where the heap-buffer-overflow issue in icAnsiToUtf8() has been patched.

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