Fix: SEGV in CIccCLUT::Interp3d()

[ChrisCoxArt]

Fixes #645

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[xsscx]

Maintainer Review

2026-03-07 23:10:03 UTC

mkdir pr-654
cd pr-654
git clone https://github.com/InternationalColorConsortium/iccDEV.git
cd iccDEV
git fetch origin pull/654/head:pr-654
git checkout pr-654
cd Build
export CXX=clang++ && export CXXFLAGS="-fsanitize=address,undefined -fno-omit-frame-pointer -g -O1 -fprofile-arcs -ftest-coverage" && export LDFLAGS="-fsanitize=address,undefined -fprofile-arcs" && cmake Cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo -DENABLE_ASAN=ON -DENABLE_UBSAN=ON -DENABLE_COVERAGE=ON
make -j32
wget https://github.com/xsscx/fuzz/raw/refs/heads/master/graphics/icc/segv-CIccCLUT-Interp3d-IccTagLut_cpp-Line2741.icc
ASAN_OPTIONS=detect_leaks=0:print_scariness=1 iccApplyProfiles foo.tif /tmp/out.tif 0 0 0 0 0 segv-CIccCLUT-Interp3d-IccTagLut_cpp-Line2741.icc 0
wget https://github.com/xsscx/fuzz/raw/refs/heads/master/graphics/icc/ub-nan-outside-range-iccApplyProfiles_cpp-Line560.icc
wget https://github.com/xsscx/fuzz/raw/refs/heads/master/graphics/tif/test_rgb.tif
ASAN_OPTIONS=detect_leaks=0:print_scariness=1 Tools/IccApplyProfiles/iccApplyProfiles test_rgb.tif /tmp/out.tif 0 0 0 0 0 segv-CIccCLUT-Interp3d-IccTagLut_cpp-Line2741.icc 0
...
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[xsscx]

GHSA-6jrq-wfqg-wv7w