While investigating UBSAN errors in https://github.com/apache/arrow/pull/5365 it was discovered Apache Arrow versions 0.12.0 to 0.14.1, left memory Array data uninitialized when reading RLE null data from parquet. This affected the C++, Python, Ruby and R implementations. The uninitialized memory could potentially be shared if are transmitted over the wire (for instance with Flight) or persisted in the streaming IPC and file formats.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| pyarrow(PyPI) | 0.12.0 | 0.15.1 | N/A |
| red-arrow(RubyGems) | 0.12.0 | 0.15.1 | N/A |
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