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CVE-2026-31794 is a denial-of-service vulnerability found in iccDEV, a library for working with ICC color profiles, prior to version 2.3.1.5 . The flaw resides in the `CIccCLUT::Interp3d()` function, which is responsible for 3D interpolation within color lookup tables . When the application processes a specially crafted ICC profile, the function attempts to read from an invalid or wild memory pointer . This out-of-bounds read operation causes the program to crash due to a segmentation fault (SEGV) . The issue is triggered during the parsing of the profile’s data, specifically when handling the CLUT (Color LookUp Table) . An attacker could exploit this by tricking a user or automated system into opening a malicious ICC profile with an application linked against the vulnerable library . The crash leads to a denial of service, disrupting any workflow relying on color management . The vulnerability is classified under CWE-125 (Out-of-bounds Read) and CWE-703 (Improper Check or Handling of Exceptional Conditions) . GitHub, as the CNA, assigned a CVSS v3.1 base score of 5.5 (Medium) with the vector AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H, indicating a local attack vector with low complexity but requiring user interaction . The maintainers have addressed and fixed this issue in the stable release version 2.3.1.5 .
Platform: iccDEV library
Version: 2.3.1.4 and earlier
Vulnerability : Out-of-bounds read
Severity: Medium (5.5)
Date: March 10, 2026
Prediction: Patch already released
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The vulnerability analysis reveals a classic memory corruption issue in a parsing function. The crash occurs in `CIccCLUT::Interp3d()` due to an invalid pointer dereference . The CWE classifications (CWE-125, CWE-703) suggest that the code lacks proper bounds checking when indexing into an array or memory buffer . Specifically, the function reads data from a lookup table based on input from the ICC profile without verifying that the calculated index falls within the table’s allocated memory region. This leads to a read from an attacker-controlled or uninitialized address, causing the segmentation fault. The exploitability is considered low for remote code execution due to the read-only nature of the fault, but it is highly reliable for causing a crash.
How Exploit:
An attacker crafts a malicious ICC profile file with corrupted or malformed CLUT data.
Example: Use a hex editor to modify a valid ICC profile. Overwrite the CLUT header or data to point to an invalid memory offset. This could involve changing the 'offset' or 'size' fields in the profile's tag table. A simple fuzzer could also be used to generate crashing inputs. Example command to test a profile with an application like 'iccToXml' (if part of the suite) ./iccToXml malicious_profile.icc Expected output: Segmentation fault (core dumped)
Protection from this CVE
The primary and recommended protection is to update the iccDEV library to version 2.3.1.5 or later .
On systems where iccDEV is installed via package manager (hypothetical example) sudo apt-get update && sudo apt-get install iccdev Or update the specific application that bundles the library. As a temporary workaround, avoid opening untrusted ICC profiles from untrusted sources. Implement file validation checks to reject malformed profiles before processing.
Impact
Successful exploitation results in a denial of service, causing the application using the iccDEV library to crash. This can interrupt critical workflows in graphic design, printing, and other industries that rely heavily on accurate color management. The impact is limited to availability (A:H), with no direct impact on confidentiality or integrity . However, repeated crashes can lead to significant downtime and loss of productivity.
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Reported By: nvd.nist.gov
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