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.
[
{
"product": "Apache Arrow",
"vendor": "Apache Software Foundation",
"versions": [
{
"status": "affected",
"version": "Apache Arrow 0.12.0 to 0.14.1"
}
]
}
]