CVE-2019-16225

Name: CVE-2019-16225
Creator: NVD / NIST
Published: 2019-09-11T15:15:11.34+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.76%

Last modified Jun 17, 2026

CVE-2019-16225 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered in py-lmdb 0.97. For certain values of mp_flags, mdb_page_touch does not properly set up mc->mc_pg[mc->top], leading to an invalid write operation. EPSS estimates a 1.76% chance of exploitation in the next 30 days.

Description

An issue was discovered in py-lmdb 0.97. For certain values of mp_flags, mdb_page_touch does not properly set up mc->mc_pg[mc->top], leading to an invalid write operation. NOTE: this outcome occurs when accessing a data.mdb file supplied by an attacker.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.76%

75.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Py-Lmdb Project	Py-Lmdb	<= 0.97

References

https://github.com/TeamSeri0us/pocs/tree/master/lmdb/lmdb%20write%20to%20illegal%20addressExploit, Third Party Advisory
https://github.com/TeamSeri0us/pocs/tree/master/lmdb/lmdb%20write%20to%20illegal%20addressExploit, Third Party Advisory

Timeline

Published: Sep 11, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-16225?

How severe is CVE-2019-16225?

CVE-2019-16225 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.76% probability of exploitation in the next 30 days.

How do I fix CVE-2019-16225?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-16225?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST