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CVE-2026-22185— OpenLDAP LMDB mdb_load Heap Buffer Underflow in readline()

Quick assessment

Affected
OpenLDAP Foundation OpenLDAP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenLDAP Lightning Memory-Mapped Database是OpenLDAP开源的一款高性能数据库。 OpenLDAP Lightning Memory-Mapped Database存在数字错误漏洞，该漏洞源于readline函数存在堆缓冲区下溢，可能导致拒绝服务和有限堆内存内容泄露。

AI Predicted 3.1 Difficulty: Moderate EPSS 0.15% · P3

Affected Version Matrix 1

VendorProduct Version RangeStatus
OpenLDAP Foundation OpenLDAP 0.9.14< 0.9.34 affected
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I. Basic Information for CVE-2026-22185

Vulnerability Information
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Vulnerability Title
OpenLDAP LMDB mdb_load Heap Buffer Underflow in readline()
Source: CVE Program / CVE List V5
Vulnerability Description
OpenLDAP Lightning Memory-Mapped Database (LMDB) versions up to and including 0.9.14, prior to commit 8e1fda8, contain a heap buffer underflow in the readline() function of mdb_load. When processing malformed input containing an embedded NUL byte, an unsigned offset calculation can underflow and cause an out-of-bounds read of one byte before the allocated heap buffer. This can cause mdb_load to crash, leading to a limited denial-of-service condition.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
OpenLDAP Lightning Memory-Mapped Database 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenLDAP Lightning Memory-Mapped Database是OpenLDAP开源的一款高性能数据库。 OpenLDAP Lightning Memory-Mapped Database存在数字错误漏洞，该漏洞源于readline函数存在堆缓冲区下溢，可能导致拒绝服务和有限堆内存内容泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenLDAP Foundation OpenLDAP 0.9.14 ~ 0.9.34 -

II. Public POCs for CVE-2026-22185

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III. Intelligence Information for CVE-2026-22185

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Mailing List Discussions for CVE-2026-22185 (2)

Other References for CVE-2026-22185 (2)

IV. Related Vulnerabilities

Same product: OpenLDAP
Same weakness: CWE-125

V. Comments for CVE-2026-22185

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