CVE-2026-22185: Openldap Foundation Openldap

Medium severity, CVSS 4.6. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Openldap Foundation Openldap: from 0.9.14, before 0.9.34 (fixed in 0.9.34)

Published 2026-01-07. Last modified 2026-06-17.