PT-2026-2159 · Openldap+2 · Openldap Lightning Memory-Mapped Database+2

Ron Edgerson · Published 2026-01-07 · Updated 2026-03-10 · CVE-2026-22185

Positive Technologies (AI Summary)

CVSS v4.0

4.6

Medium

Base vector

AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions OpenLDAP Lightning Memory-Mapped Database (LMDB) versions up to and including 0.9.14

Description The software contains a heap buffer underflow in the readline() function of mdb load. Processing malformed input with an embedded NUL byte can cause an unsigned offset calculation to underflow, resulting in an out-of-bounds read of one byte before the allocated heap buffer. This can lead to a denial-of-service condition due to a crash.

Recommendations Versions prior to 0.9.14 and commit 8e1fda8 should be updated.

Exploit

Fix

DoS

Integer Underflow

Out of bounds Read

Weakness Enumeration

CWE-191

CWE-125

Related Identifiers

BDU:2026-03592

CVE-2026-22185

ECHO-BAA8-BD1C-CF1B

OESA-2026-1334

OESA-2026-1335

OESA-2026-1425

OESA-2026-1426

OESA-2026-1427

OESA-2026-1428

SUSE-SU-2026:0256-1

Affected Products

Debian

Openldap Lightning Memory-Mapped Database

Red Os

References · 37

• 🔥 https://seclists.org/fulldisclosure/2026/Jan/5 · Exploit
• 🔥 https://seclists.org/fulldisclosure/2026/Jan/8 · Exploit
• https://bdu.fstec.ru/vul/2026-03592 · Security Note
• https://osv.dev/vulnerability/OESA-2026-1335 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1428 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0256-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-22185 · Security Note
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-12-CVE-2026-22185 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-22185 · Vendor Advisory
• https://bugs.openldap.org/show_bug.cgi?id=10421 · Patch
• https://osv.dev/vulnerability/OESA-2026-1334 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-22185 · Security Note
• https://ubuntu.com/security/CVE-2026-22185 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-22185 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-22185 · Vendor Advisory