PT-2019-6373 · Lmdb+2 · Py-Lmdb+2

Published 2019-09-11 · Updated 2026-03-25 · CVE-2019-16226

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions py-lmdb version 0.97

Description The issue is related to the mdb node del function in the py-lmdb module, which does not properly validate a memmove operation when encountering an unexpected node->mn hi value. This can lead to an invalid write operation, potentially causing a buffer overflow in memory when processing a data.mdb file. The exploitation of this issue could allow a remote attacker to cause a denial of service.

Recommendations For py-lmdb version 0.97, as a temporary workaround, consider disabling the mdb node del function until a patch is available. Restrict access to the data.mdb file to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

ALT-PU-2022-2146

ALT-PU-2022-2549

BDU:2023-04195

CVE-2019-16226

GHSA-R8G9-W4F3-9CRM

OPENSUSE-SU-2026:10430-1

PYSEC-2019-238

Affected Products

Alt Linux

Debian

Py-Lmdb

References · 24

• 🔥 https://github.com/TeamSeri0us/pocs/tree/master/lmdb/lmdb%20memory%20corruption%20vuln · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-16226 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-16226 · Security Note
• https://cve.org/CVERecord?id=CVE-2019-16226 · Security Note
• https://osv.dev/vulnerability/CVE-2019-16226 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-16226 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2019-238 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-16226 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-r8g9-w4f3-9crm · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10430-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-04195 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2019-16226 · Vendor Advisory
• https://github.com/LMDB/lmdb/blob/mdb.master/libraries/liblmdb/mdb.c#L8443-L8498 · Note
• https://github.com/jnwatson/py-lmdb · Note
• https://github.com/jnwatson/py-lmdb/tags · Note