Critical Use-After-Free Vulnerability in MariaDB Affects Multiple Alpine Versions

mariadb Updated 02 Oct 2025

Summary

14/04/2022

Disclosed on

N/A

Severity

Yes i

Fix available

High

Severity

7.5

CVSS Score

ALPINE-CVE-2022-27455: MariaDB Server v10.6.3 and below was discovered to contain an use-after-free in the component my_wildcmp_8bit_impl at /strings/ctype-simple.c. Affects mariadb versions < 10.4.25-r0. Fixed in 10.4.25-r0. How to fix ↓

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Background

MariaDB is an open-source relational database management system that is widely used for web applications and data storage. It is known for its high performance, reliability, and ease of use. However, certain versions of MariaDB have been found to be vulnerable to a use-after-free issue, which could lead to potential security risks if not addressed promptly.

Vulnerability Detail

The vulnerability identified as CVE-2022-27455 affects MariaDB Server versions up to 10.6.3. It is caused by a use-after-free error in the my_wildcmp_8bit_impl function located in the strings/ctype-simple.c file. This flaw can be exploited to cause application crashes or potentially allow an attacker to execute arbitrary code, leading to unauthorized access or data manipulation. The vulnerability has a CVSS score of 7.5, indicating a high severity level.

How To Fix

Minimum fixed version

10.4.25-r0

This is the first release that contains the fix.

sudo apk add --upgrade mariadb

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Workaround

As a temporary workaround, users can limit access to the MariaDB server and monitor for unusual activity until the package is updated. Additionally, disabling features that rely on the affected function may reduce risk.

Conclusion

The use-after-free vulnerability in MariaDB (CVE-2022-27455) poses significant risks to applications using affected versions. It is crucial for users to update to the latest patched versions to safeguard their systems against potential exploits.

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