Vulnerability · Published Mar 20, 2026 · Assigned by GitHub_M
CVE-2026-32710Heap-based Buffer Overflow in MariaDB
High 8.6
In plain English
A high-severity heap buffer overflow in server from MariaDB. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official description
MariaDB server is a community developed fork of MySQL server. An authenticated user can crash MariaDB versions 11.4 before 11.4.10 and 11.8 before 11.8.6 via a bug in JSON_SCHEMA_VALID() function. Under certain conditions it might be possible to turn the crash into a remote code execution. These conditions require tight control over memory layout which is generally only attainable in a lab environment. This issue is fixed in MariaDB 11.4.10, MariaDB 11.8.6, and MariaDB 12.2.2.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | mariadb | 1:11.8.6-0+deb13u1 | DEBIAN-CVE-2026-32710 |
| Debian:14 | mariadb | 1:11.8.6-1 | DEBIAN-CVE-2026-32710 |
| Rocky Linux:10 | galera | 0:26.4.25-1.el10_2 | RLSA-2026:19021 |
| Rocky Linux:9 | galera | 0:26.4.25-1.module+el9.8.0+40192+484cc2de | RLSA-2026:19182 |
| Rocky Linux:9 | mariadb | 3:11.8.6-2.module+el9.8.0+40192+484cc2de | RLSA-2026:19182 |
| Rocky Linux:10 | mariadb11.8 | 3:11.8.6-2.el10_2 | RLSA-2026:19021 |
| Ubuntu:24.04:LTS | mariadb | no fix listed | UBUNTU-CVE-2026-32710 |
| Ubuntu:25.10 | mariadb | no fix listed | UBUNTU-CVE-2026-32710 |
Affected products (as reported)
Weakness: CWE-122 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
References
- https://github.com/MariaDB/server/security/advisories/GHSA-4rj5-2227-9wgc x_refsource_CONFIRM
- https://jira.mariadb.org/browse/MDEV-38356 x_refsource_MISC