Description
The mysqlnd wire protocol parser reads fields out of server packets before checking that the packet still holds enough bytes for them. A malicious or compromised MySQL server can send a truncated packet and make the client read past the end of the packet buffer, which is undefined behaviour and can crash the process.
Published: 2026-09-25
Score: 3.4 Low
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-6514-1 php8.4 security update
History

Fri, 25 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
Description The mysqlnd wire protocol parser reads fields out of server packets before checking that the packet still holds enough bytes for them. A malicious or compromised MySQL server can send a truncated packet and make the client read past the end of the packet buffer, which is undefined behaviour and can crash the process.
Title Various packet overreads in mysqlnd_writeprotocol.c
Weaknesses CWE-122
References
Metrics cvssV3_1

{'score': 3.4, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: php

Published:

Updated: 2026-09-25T20:48:21.777Z

Reserved: 2025-02-11T04:49:52.603Z

Link: CVE-2025-1218

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-25T21:17:20.993

Modified: 2026-09-25T21:17:20.993

Link: CVE-2025-1218

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-122

    Heap-based Buffer Overflow