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The vulnerability, identified as CVE-2026-31795, resides in the `CIccXform3DLut::Apply()` function within iccDEV versions prior to 2.3.1.5 . iccDEV is a library used for handling ICC color profiles. This function is responsible for applying a 3D lookup table transformation to image data. The flaw is a stack-based buffer overflow, triggered when the function writes data beyond the allocated buffer on the stack. An attacker can exploit this by providing a specially crafted ICC color profile. When an application using the vulnerable iccDEV library processes this malicious profile, the `Apply()` function attempts to write color transformation results into a stack buffer that is too small. This overflow corrupts adjacent stack memory, potentially leading to a program crash or, under the right conditions, arbitrary code execution with the privileges of the process using the library. The vulnerability is fixed in version 2.3.1.5 .
Platform: iccDEV
Version: Before 2.3.1.5
Vulnerability: Stack Buffer Overflow
Severity: Critical
Date: March 10, 2026
Prediction: Patch already released
What Undercode Say:
Analysis
The vulnerability is a classic case of insufficient bounds checking. The `CIccXform3DLut::Apply` function likely iterates through the cells of a 3D lookup table without verifying that its output buffer can hold the computed data. This is a memory corruption issue that can be reliably triggered.
Check Version
Check the installed version of the library (if using pkg-config) pkg-config --modversion iccdev Alternatively, check for the library file and its version string strings /usr/lib/libiccdev.so | grep -i version If the package manager was used (e.g., on Debian/Ubuntu) dpkg -l | grep iccdev
Test for Vulnerability (using a malformed ICC profile)
Example using a tool that processes ICC profiles (like iccdump or samptcpg) This command attempts to process a malicious profile. A crash indicates vulnerability. ./vulnerable_icc_processor malicious_profile.icc Monitor system logs for crashes related to iccDEV dmesg | grep -i "iccdev" journalctl | grep -i "segfault.iccdev"
Detect Crashes (with GDB)
Run the application in a debugger to catch the overflow gdb --args ./icc_profile_viewer exploit_profile.icc Inside GDB, run the program (gdb) run If it crashes, inspect the call stack (gdb) backtrace The crash will likely be inside CIccXform3DLut::Apply()
Exploit
Exploitation involves crafting an ICC profile with a maliciously defined 3D Look-Up Table (LUT). When the `Apply` function processes it, the oversized LUT data overflows a fixed stack buffer, overwriting the return address or other critical data to hijack program flow.
Protection from this CVE
- Update Library: Upgrade `libiccdev` to version 2.3.1.5 or later immediately .
- Compiler Hardening: Recompile any statically linked applications with stack canaries enabled (e.g.,
-fstack-protector-strong). - ASLR: Ensure Address Space Layout Randomization is enabled system-wide.
- SELinux/AppArmor: Use mandatory access controls to restrict the capabilities of applications processing untrusted ICC profiles.
Impact
- Denial of Service: Applications processing malicious profiles will crash.
- Code Execution: In worst-case scenarios, an attacker could execute arbitrary code, potentially leading to system compromise if the vulnerable process has high privileges.
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Sources:
Reported By: nvd.nist.gov
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