CVE-2026-107821
Received Received - Intake

Memory Corruption in MariaDB Server via FRM Metadata

Publication date: 2026-10-09

Last updated on: 2026-10-09

Assigner: GitHub, Inc.

Description
MariaDB server is a community developed fork of MySQL server. From 10.6.1 until 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2, MariaDB insufficiently validated counts, offsets, lengths, and field boundaries in FRM metadata while opening binary FRM files. An attacker able to place a crafted FRM file in the data directory could trigger out-of-bounds reads or writes, crash the server, or potentially execute code. This issue is fixed in versions 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2.

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Meta Information

Published
2026-10-09
Last Modified
2026-10-09
Generated
2026-10-09
AI Q&A
2026-10-09
EPSS Evaluated
N/A
NVD
CVE-2026-107821
EUVD
EUVD-2026-95921

Affected Vendors & Products

Showing 6 associated CPEs
Vendor Product Version / Range
MariaDB server >= 10.6.1, < 10.6.28
MariaDB server >= 10.11.1, < 10.11.19
MariaDB server >= 11.4.1, < 11.4.13
MariaDB server >= 11.8.1, < 11.8.9
MariaDB server >= 12.3.1, < 12.3.3
MariaDB server >= 13.0.1, < 13.0.2

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-1285 The product receives input that is expected to specify an index, position, or offset into an indexable resource such as a buffer or file, but it does not validate or incorrectly validates that the specified index/position/offset has the required properties.

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Executive Summary

This vulnerability in MariaDB (CVE-2026-107821) involves insufficient validation of FRM metadata when opening binary FRM files. An attacker could place a crafted FRM file in the data directory to trigger out-of-bounds reads or writes, crash the server, or potentially execute code. The issue affects MariaDB versions from 10.6.1 to 10.6.27, 10.11.1 to 10.11.18, 11.4.1 to 11.4.12, 11.8.1 to 11.8.8, 12.3.1 to 12.3.2, and 13.0.1.

Detection Guidance

Detecting this vulnerability requires checking MariaDB server versions against affected ranges. Use commands like 'mysql --version' or 'mariadb --version' to check your version. Compare it with vulnerable versions: 10.6.1-10.6.27, 10.11.1-10.11.18, 11.4.1-11.4.12, 11.8.1-11.8.8, 12.3.1-12.3.2, 13.0.1.

Impact Analysis

An attacker with FILE privilege and access to the datadir could exploit this to crash the MariaDB server, read or write memory outside intended boundaries, or execute arbitrary code. This could lead to data corruption, unauthorized access, or denial of service. Exploitation requires significant privileges and access, reducing risk in properly configured environments.

Compliance Impact

This vulnerability could impact compliance by enabling unauthorized data access or modification, violating confidentiality and integrity requirements in GDPR and HIPAA. A successful exploit might lead to data breaches, requiring breach notifications and potential fines under these regulations.

Mitigation Strategies

Upgrade MariaDB to patched versions: 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, or 13.0.2. Ensure proper access controls restrict FILE privilege and datadir access to trusted users only.

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