Detailed report: https://oss-fuzz.com/testcase?key=5644258942386176 Project: harfbuzz Fuzzer: libFuzzer_harfbuzz_hb-shape-fuzzer Fuzz target binary: hb-shape-fuzzer Job Type: libfuzzer_msan_harfbuzz Platform Id: linux Crash Type: Use-of-uninitialized-value Crash Address: Crash State: hb_kern_machine_t<OT::KernSubTableFormat3>::kern OT::KernSubTableFormat3::apply OT::KernSubTable::apply Sanitizer: memory (MSAN) Recommended Security Severity: Medium Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5644258942386176 Issue filed automatically. See https://github.com/google/oss-fuzz/blob/master/docs/reproducing.md for more information. This bug is subject to a 90 day disclosure deadline. If 90 days elapse without an upstream patch, then the bug report will automatically become visible to the public. When you fix this bug, please * mention the fix revision(s). * state whether the bug was a short-lived regression or an old bug in any stable releases. * add any other useful information. This information can help downstream consumers. If you need to contact the OSS-Fuzz team with a question, concern, or any other feedback, please file an issue at https://github.com/google/oss-fuzz/issues.