CVE-2026-22185
OpenLDAP LMDB mdb_load Heap Buffer Underflow in readline()
3.3CVSSLOW
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 Vector Breakdown
Exploitability
AV:LAccess VectorLocal
AC:LAccess ComplexityLow
Impact
C:NConfidentialityNone
I:NIntegrityNone
A:LAvailabilityL
Weaknesses
Affected Products
Attack Graph
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Exploitability
Official Patch Available
MITRE ATT&CK
2 techniques Collection
Initial Access
References
https://bugs.openldap.org/show_bug.cgi?id=10421
bugs.openldap.org
https://nvd.nist.gov/vuln/detail/CVE-2026-22185
nvd.nist.gov
https://redos.red-soft.ru/support/secure/
redos.red-soft.ru
and 12 more references View all →
Timeline
Published
Jan 7, 2026
Last Updated
Jan 14, 2026
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