CVE-2026-101731
Description
A flaw was found in the MySQL Server Optimizer. A remote attacker with high privileges can exploit this vulnerability over network protocols to cause the server to hang or crash repeatedly. This issue results in a complete denial of service (DoS) for the database service.
Statement
This flaw is rated as Moderate impact for Red Hat Enterprise Linux because exploitation requires an attacker to already possess high administrative privileges on the target database instance. Although an authenticated administrator can trigger a denial of service by causing the database server process to terminate unexpectedly or stop responding during query optimization, the vulnerability does not compromise data confidentiality or integrity. Furthermore, standard database deployments restrict elevated account privileges to authorized administrators, significantly limiting potential exposure.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 4.9 | N/A | 4.9 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | High | N/A | High |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | None |
| Integrity Impact | None | N/A | None |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
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