CVE-2026-22185
MEDIUM EPSS 2.7%
Published Jan 7, 20265mo ago · Modified Jun 17, 20261w ago
4.6 CVSS 4.0
Published Jan 7, 2026 5mo ago
Last Modified Jun 17, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
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/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 Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction A
Scope X
Threat Intelligence
EPSS Exploit Probability
2.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 2
CWE-125 Out-of-bounds Read Memory Safety
CWE-191
References 5
- bugs.openldap.org https://bugs.openldap.org/show_bug.cgi?id=10421
- seclists.org https://seclists.org/fulldisclosure/2026/Jan/5
- seclists.org https://seclists.org/fulldisclosure/2026/Jan/8
- openldap.org https://www.openldap.org/
- vulncheck.com https://www.vulncheck.com/advisories/openldap-lmdb-mdb-load-heap-buffer-underflow-in-readline
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.