website: add Apache Arrow 25.0.1 blogpost

_posts/2026-08-10-25.0.1-release.md

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+---
+layout: post
+title: "Apache Arrow 25.0.1 Release"
+date: "2026-08-10 00:00:00"
+author: pmc
+categories: [release]
+---
+<!--
+{% comment %}
+Licensed to the Apache Software Foundation (ASF) under one or more
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+http://www.apache.org/licenses/LICENSE-2.0
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+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+{% endcomment %}
+-->
+
+
+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**][1]
+on [**10 distinct commits**][2] from [**6 distinct contributors**][2].
+
+See the [Install Page](https://arrow.apache.org/install/) 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][3].
+
+## C++ notes
+
+* Fix possible Segfault on SVE128 unpack ([GH-50503](https://github.com/apache/arrow/issues/50503)),
+  ([GH-50605](https://github.com/apache/arrow/issues/50605)).
+* Bump bundled mimalloc to fix possible Segfault with bundled mimalloc ([GH-50471](https://github.com/apache/arrow/issues/50471)),
+  ([GH-50428](https://github.com/apache/arrow/issues/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](https://github.com/apache/arrow/issues/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](https://github.com/apache/arrow/issues/50808)).
+
+## Other modules and languages
+
+No general changes were made to the other libraries or languages.
+
+
+[1]: https://github.com/apache/arrow/milestone/76?closed=1
+[2]: {{ site.baseurl }}/release/25.0.1.html#contributors
+[3]: {{ site.baseurl }}/release/25.0.1.html#changelog