graphicsmagick/coder_CUT_fuzzer: Index-out-of-bounds in ReadCUTImage

Project:
http://hg.code.sf.net/p/graphicsmagick/code

Detailed report: https://oss-fuzz.com/testcase?key=6059621107105792

Project: graphicsmagick
Fuzzer: libFuzzer_graphicsmagick_coder_CUT_fuzzer
Fuzz target binary: coder_CUT_fuzzer
Job Type: libfuzzer_ubsan_graphicsmagick
Platform Id: linux

Crash Type: Index-out-of-bounds
Crash Address:
Crash State:
ReadCUTImage
ReadImage
BlobToImage

Sanitizer: undefined (UBSAN)

Recommended Security Severity: Medium

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=6059621107105792

Issue filed automatically.

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