CVE-2026-101727
Description
A flaw was found in MySQL within the Server Replication component. A remote attacker with high privileges and network access can exploit this vulnerability to trigger an unexpected hang or repeatable crash. This issue results in a complete Denial of Service (DoS), rendering the database service unavailable to legitimate users.
Statement
This vulnerability is rated as Moderate severity for Red Hat Enterprise Linux because successful exploitation requires an attacker to possess high administrative privileges over the network to trigger a denial of service. While an attack can lead to a hang or crash affecting database availability, unauthenticated users cannot trigger the condition. In typical Red Hat deployments, restricting privileged database access and limiting network exposure of replication interfaces significantly reduces the operational risk.
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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