> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/release-notes/connectors/c/3.4/3.4.10.md).

# Connector/C 3.4.10 Release Notes

Release notes for MariaDB Connector/C 3.4.10, a Stable (GA) release published 24 August 2026.

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<p align="center">The most recent release of <a href="/docs/connectors/mariadb-connector-c.md">MariaDB Connector/C</a> is: <a href="/docs/release-notes/connectors/c/3.4/3.4.11.md"><strong>3.4.11</strong></a></p>

<p align="center"><a href="https://mariadb.com/downloads/connectors/connectors-data-access/c-connector" class="button primary">Download Connector/C 3.4.11</a></p>
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<a href="https://mariadb.com/downloads/connectors/connectors-data-access/c-connector" class="button primary">Download</a> <a href="/docs/release-notes/connectors/c/3.4/3.4.10.md" class="button secondary">Release Notes</a> <a href="/docs/release-notes/connectors/c/changelogs/3.4/3.4.10.md" class="button secondary">Changelog</a> <a href="/docs/connectors/mariadb-connector-c.md" class="button secondary">About MariaDB Connector/C</a>

**Release date:** 24 Aug 2026

This is a [***Stable (GA)***](/docs/release-notes/community-server/about/release-criteria.md) release of MariaDB Connector/C, formerly known as MariaDB Client Library for C.

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**For a description of this library see the** [**MariaDB Connector/C**](/docs/connectors/mariadb-connector-c.md) **page.**
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## Notable Items

* Included in MariaDB Community Server [11.4.13](/docs/release-notes/community-server/11.4/11.4.13.md), [11.8.9](/docs/release-notes/community-server/11.8/11.8.9.md), and [12.3.3](/docs/release-notes/community-server/12.3/12.3.3.md)
* Enable schannel async, unify synchronous and asynchronous IO
* MariaDB Connector/C 3.4.10 was shipped within MariaDB Community Server releases and was not published as an independent standalone package; Connector/C 3.4.11 is the standalone release incorporating all fixes and improvements from 3.4.10 and 3.4.11

## Issues Fixed

* [CONC-813](https://jira.mariadb.org/browse/CONC-813), [CONC-814](https://jira.mariadb.org/browse/CONC-814): Fix UBSan errors (Thanks to Michael Schorm for contribution)
* [CONC-817](https://jira.mariadb.org/browse/CONC-817): Cmake cleanup (Thanks to Michael Schorm for contribution)
* [CONC-818](https://jira.mariadb.org/browse/CONC-818): report CR\_SERVER\_LOST on TLS connection close (Thanks to Michael Schorm for contribution)
* [CONC-820](https://jira.mariadb.org/browse/CONC-820): Clamp server-provided field lengths to maximum bounds (reported by fg0x0)
* [CONC-825](https://jira.mariadb.org/browse/CONC-825): Fix unaligned pointer cast in int2store macro
* [CONC-826](https://jira.mariadb.org/browse/CONC-826): don't revalidate certificate after COM\_CHANGE\_USER
* [CONC-827](https://jira.mariadb.org/browse/CONC-827),[CONC-829](https://jira.mariadb.org/browse/CONC-829): Fix overflows and bugs identified by rpl\_fuzzer
* [CONC-828](https://jira.mariadb.org/browse/CONC-828): Remove pvio blocking/is\_blocking methods, always use non-blocking sockets
* [CONC-830](https://jira.mariadb.org/browse/CONC-830): Add MARIADB\_CLIENT\_PLUGIN\_EXPORT for zstd compression plugin
* [CONC-834](https://jira.mariadb.org/browse/CONC-834): Fix poll timeout reset loop on EINTR signals (Thanks to Shaohua Wang for contribution)
* [CONC-835](https://jira.mariadb.org/browse/CONC-835): Fix pre-auth memory exhaustion in packet reassembly
* [CONC-838](https://jira.mariadb.org/browse/CONC-838): Fix PBKDF2 CPU stall vulnerability in parsec auth plugin
* [CONC-840](https://jira.mariadb.org/browse/CONC-840): Maximum number of result set columns is now limited up to 0xFFFFF (1048575) columns
* [CONC-841](https://jira.mariadb.org/browse/CONC-841): Added support for MYSQL\_VECTOR field type (ps protocol)
* [CONC-842](https://jira.mariadb.org/browse/CONC-842): Fix heap buffer over-read in mthd\_my\_read\_rows
* [CONC-843](https://jira.mariadb.org/browse/CONC-843): Throw error for unknown field types (MYSQL\_VECTOR) instead of crashing
* [CONC-844](https://jira.mariadb.org/browse/CONC-844): OOB read and integer underflow in init\_read\_hdr() via untrusted dynamic column header
* [CONC-846](https://jira.mariadb.org/browse/CONC-846): Auth-switch allows cleartext password leakage on TLS hostname verification failure
* [CONC-847](https://jira.mariadb.org/browse/CONC-847): Fix OOB read in unpack\_fields() on truncated metadata packet
* Fixes for the following [security vulnerabilities](/docs/server/security/cve.md):
  * [CVE-2026-107819](https://www.cve.org/CVERecord?id=CVE-2026-107819)

## Changelog

For a list of changes made in this release, with links to detailed information on each push, see the [changelog](/docs/release-notes/connectors/c/changelogs/3.4/3.4.10.md).

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MariaDB may already be included in your favorite OS distribution. More information can be found on the [Distributions which Include MariaDB](/docs/general-resources/distributions-including-mariadb.md) page.
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