MariaDBに解放済みメモリの使用の脆弱性（CVE-2026-85748）
概要
MariaDBに解放済みメモリの使用の脆弱性が確認されました。
バージョン 12.3.1 以上 12.3.3 未満、13.0.1に影響があります。
修正版 12.3.3 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID | CVE-2026-85748 |
|---|---|
| 脆弱性の種類 | 解放済みメモリの使用 |
| 危険度 | 重大 |
| CVSSスコア |
9.9（CVSS v3.1） CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| 公開日 | 2026年10月16日 |
| 更新日 | 2026年10月20日 |
影響を受ける製品
| 製品 | 影響を受けるバージョン | 修正版 | 出典 |
|---|---|---|---|
| MariaDB |
12.3.1 以上 12.3.3 未満、13.0.1 | 12.3.3 | NVD（National Vulnerability Database / NIST） |
推奨対応
- MariaDBを修正版 12.3.3 またはそれ以降の公式最新版へ更新してください。
情報元の原文
NVD（National Vulnerability Database / NIST）
MariaDB server is a community developed fork of MySQL server. From 12.3.1 until 12.3.3 and 13.0.2, SYS_REFCURSOR handling is affected because cursor-array reallocation can leave stale references in routine contexts. A low-privileged attacker can open a large number of SYS_REFCURSORs and then fetch one to trigger a use-after-free that can enable remote code execution when combined with another vulnerability. This issue is fixed in versions 12.3.3 and 13.0.2.
利用条件：米国政府の著作物（パブリックドメイン）・原文のまま掲載
Copyright 1999-2026 The MITRE Corporation
CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.
CVE List（CVE Program）
MariaDB: Use-after-free with a large number of SYS_REFCURSOR's
MariaDB server is a community developed fork of MySQL server. From 12.3.1 until 12.3.3 and 13.0.2, SYS_REFCURSOR handling is affected because cursor-array reallocation can leave stale references in routine contexts. A low-privileged attacker can open a large number of SYS_REFCURSORs and then fetch one to trigger a use-after-free that can enable remote code execution when combined with another vulnerability. This issue is fixed in versions 12.3.3 and 13.0.2.
利用条件：CVE の利用条件（CVE Terms of Use）・原文のまま掲載
Copyright 1999-2026 The MITRE Corporation
CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.
情報元
- NVD（National Vulnerability Database / NIST）
https://nvd.nist.gov/vuln/detail/CVE-2026-85748 - CVE List（CVE Program）
https://www.cve.org/CVERecord?id=CVE-2026-85748