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CVE-2025-1218

Various packet overreads in mysqlnd_writeprotocol.c

Low3.4EPSS 0.28%
Published
Updated
Reserved
Assigned by
php

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.

Timeline

  1. ID reserved

    By php

  2. · 20 months later

    Published

  3. · 3 days later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2025-1218, by who scored it
Scored byCVSSScoreVector
phpCNA (assigner)3.1Low3.4CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
NVDNVD · Analyzed3.1Medium5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.28% · top 79% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.4.

Weakness

Affected products

  • PHP Group · PHP

    • affected 8.2.* – < 8.2.34
    • affected 8.3.* – < 8.3.35
    • affected 8.4.* – < 8.4.26
    • affected 8.5.* – < 8.5.11

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .