I made a fix for this, it would be great to get it into the release.

https://github.com/apache/spark/pull/56875

Thanks Huaxin!
Szehon


On Mon, Jun 29, 2026 at 4:54 PM Szehon Ho <[email protected]> wrote:

> Sorry I was informed of a potential vulnerability/problem in new fromWKB
> in Spark 4.2, looking now at it.
>
> Thanks
> Szehon
>
> On Mon, Jun 29, 2026 at 1:05 PM Allison Wang <[email protected]>
> wrote:
>
>> +1
>>
>> On Mon, Jun 29, 2026 at 10:34 AM Max Gekk <[email protected]> wrote:
>>
>>> +1
>>>
>>> On Mon, Jun 29, 2026 at 6:32 PM Xiao Li <[email protected]> wrote:
>>> >
>>> > +1 (binding)
>>> >
>>> > Verified on Linux (Ubuntu, JDK 17, Python 3.11):
>>> >
>>> > - Signatures: every artifact (source, the three binary distributions,
>>> the pyspark/pyspark_client/pyspark_connect tarballs, and SparkR) has a good
>>> GPG signature from the RM key 709226B910E0F10917123B6259B586ADA5A538D1,
>>> which is in KEYS.
>>> > - Checksums: SHA512 matches for all artifacts.- Tag/commit: v4.2.0-rc4
>>> resolves to f92a807c06b, and the RELEASE metadata embedded in the binary
>>> distributions records the same git revision.
>>> > - Source build: compiled and packaged spark-core and its module
>>> dependencies from the source tarball with ./build/mvn on JDK 17 (BUILD
>>> SUCCESS).
>>> > - Binary distribution: ran SparkPi and a spark-shell Scala job (range
>>> aggregation + Spark SQL) — results correct.
>>> > - PySpark: pip-installed pyspark-4.2.0.tar.gz and ran DataFrame, Spark
>>> SQL, and a Python UDF in local mode — results correct.
>>> >
>>> > Thanks Huaxin for driving the release!
>>> >
>>> > Xiao
>>> >
>>> > Uroš Bojanić <[email protected]> 于2026年6月29日周一 09:12写道:
>>> >>
>>> >> +1 (non-binding)
>>> >>
>>> >> verified RC4 (tag v4.2.0-rc4, commit f92a807c06b) on macOS/arm64.
>>> >>
>>> >> - Good GPG signatures and SHA512 sums on all artifacts (source, three
>>> binaries, the PySpark/SparkR tarballs) against KEYS.
>>> >> - Built the full source tree from the tag with -Phive
>>> -Phive-thriftserver, got a clean BUILD SUCCESS across all 39 modules.
>>> >> - Ran quick smoke tests across every API surface: Java, Scala, SQL,
>>> and PySpark job from the bundled distro; all look good.
>>> >> - Sanity-checked the binary dist (RELEASE, LICENSE/NOTICE/licenses
>>> all present) and ran dev/check-license; RAT passes.
>>> >> - Diffed the docs against 4.1.0 and analyzed the changes (new pages,
>>> migration guides and version refs); all look good.
>>> >>
>>> >> Thank you Huaxin Gao!
>>> >>
>>> >> On 2026/06/27 00:21:32 [email protected] wrote:
>>> >> > Please vote on releasing the following candidate as Apache Spark
>>> version 4.2.0.
>>> >> >
>>> >> > The vote is open until Mon, 29 Jun 2026 18:21:31 PDT and passes if
>>> a majority +1 PMC votes are cast, with
>>> >> > a minimum of 3 +1 votes.
>>> >> >
>>> >> > [ ] +1 Release this package as Apache Spark 4.2.0
>>> >> > [ ] -1 Do not release this package because ...
>>> >> >
>>> >> > To learn more about Apache Spark, please see
>>> https://spark.apache.org/
>>> >> >
>>> >> > The tag to be voted on is v4.2.0-rc4 (commit f92a807c06b):
>>> >> > https://github.com/apache/spark/tree/v4.2.0-rc4
>>> >> >
>>> >> > The release files, including signatures, digests, etc. can be found
>>> at:
>>> >> > https://dist.apache.org/repos/dist/dev/spark/v4.2.0-rc4-bin/
>>> >> >
>>> >> > Signatures used for Spark RCs can be found in this file:
>>> >> > https://downloads.apache.org/spark/KEYS
>>> >> >
>>> >> > The staging repository for this release can be found at:
>>> >> >
>>> https://repository.apache.org/content/repositories/orgapachespark-1524/
>>> >> >
>>> >> > The documentation corresponding to this release can be found at:
>>> >> > https://dist.apache.org/repos/dist/dev/spark/v4.2.0-rc4-docs/
>>> >> >
>>> >> > The list of bug fixes going into 4.2.0 can be found at the
>>> following URL:
>>> >> > https://issues.apache.org/jira/projects/SPARK/versions/12356380
>>> >> >
>>> >> > FAQ
>>> >> >
>>> >> > =========================
>>> >> > How can I help test this release?
>>> >> > =========================
>>> >> >
>>> >> > If you are a Spark user, you can help us test this release by taking
>>> >> > an existing Spark workload and running on this release candidate,
>>> then
>>> >> > reporting any regressions.
>>> >> >
>>> >> > If you're working in PySpark you can set up a virtual env and
>>> install
>>> >> > the current RC via "pip install
>>> https://dist.apache.org/repos/dist/dev/spark/v4.2.0-rc4-bin/pyspark-4.2.0.tar.gz
>>> "
>>> >> > and see if anything important breaks.
>>> >> > In the Java/Scala, you can add the staging repository to your
>>> project's resolvers and test
>>> >> > with the RC (make sure to clean up the artifact cache before/after
>>> so
>>> >> > you don't end up building with an out of date RC going forward).
>>> >> >
>>> >> >
>>> ---------------------------------------------------------------------
>>> >> > To unsubscribe e-mail: [email protected]
>>> >> >
>>> >> >
>>> >>
>>> >> ---------------------------------------------------------------------
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>>> >>
>>>
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