Apache Arrow 25.0.1 Release

Published 10 Aug 2026
By The Apache Arrow PMC (pmc)

The Apache Arrow team is pleased to announce the 25.0.1 release. The 25.0.1 release is mostly a bugfix release that includes 9 resolved issues on 10 distinct commits from 6 distinct contributors.

See the Install Page to learn how to get the libraries for your platform.

The release notes below are not exhaustive and only expose selected highlights of the release. Many other bugfixes and improvements have been made: we refer you to the complete changelog.

C++ notes

• Fix possible Segfault on SVE128 unpack (GH-50503), (GH-50605).
• Bump bundled mimalloc to fix possible Segfault with bundled mimalloc (GH-50471), (GH-50428).

Python notes

• Add performance improvement in order to solve Apache Spark's performance regression on their switch from regular Python UDFs to Arrow serialization by default (GH-50326).
• Narrow the Feather deprecation added in 25.0.0 to legacy V1 only. pyarrow.feather V2 reads and writes no longer warn, while V1 reads and writes emit DeprecationWarning instead of FutureWarning (GH-50808).

Other modules and languages

No general changes were made to the other libraries or languages.