CVE-2026-85745Public exploitNetwork attack vectorHinoki check available

Memory disclosure via unchecked MultiPolygon header advancement

Published Oct 16, 2026 · Updated Oct 16, 2026

Buffer over-read in MariaDB Server ST_Area allows remote authenticated users to read memory via malformed MultiPolygon data. The MultiPolygon parser advances past a nested geometry header without checking that enough input remains, causing reads beyond the allocated buffer. Low-privileged database access is sufficient; disclosed memory assists ASLR bypass in a multi-vulnerability chain rather than independently establishing code execution.

CVSS severity4.3
Medium
EPSS probability0.35%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Buffer over-read in MariaDB Server ST_Area allows remote authenticated users to read memory via malformed MultiPolygon data. The MultiPolygon parser advances past a nested geometry header without checking that enough input remains, causing reads beyond the allocated buffer. Low-privileged database access is sufficient; disclosed memory assists ASLR bypass in a multi-vulnerability chain rather than independently establishing code execution.

The record

CVE
CVE-2026-85745
Published
Oct 16, 2026
Updated
Oct 16, 2026
Vendor
MariaDB
Product
MariaDB Server
Classifications
CWE-126
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 10.11.1, < 10.11.19
  2. Affected versionversion=>= 10.6.1, < 10.6.28
  3. Affected versionversion=>= 11.4.1, < 11.4.13
  4. Affected versionversion=>= 11.8.1, < 11.8.9
  5. Affected versionversion=>= 12.3.1, < 12.3.3
  6. Affected versionversion=>= 13.0.1, < 13.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MariaDB · MariaDB Serverversion=>= 10.11.1, < 10.11.19; version=>= 10.6.1, < 10.6.28; version=>= 11.4.1, < 11.4.13; version=>= 11.8.1, < 11.8.9; version=>= 12.3.1, < 12.3.3; version=>= 13.0.1, < 13.0.2

Published CVSS scores

4.3MariaDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-126Buffer Over-read

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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