Security readout for executives and security teams
Plain-English summary
This issue affects the LMDB mdb_load utility shipped with OpenLDAP/LMDB. A malformed database dump containing an embedded NUL byte can crash the tool. Business impact appears limited to denial of service during database loading or maintenance workflows, not remote compromise.
Executive priority
Treat as a routine but real maintenance risk. Prioritize environments that import directory database dumps or accept externally supplied backups. The issue is crash-oriented and local/user-assisted, so it is less urgent than remotely exploitable LDAP service vulnerabilities.
Technical view
LMDB through 0.9.14, before commit 8e1fda8, has a heap buffer underflow in mdb_load readline(). Malformed input can trigger an unsigned offset underflow and a one-byte out-of-bounds read before a heap buffer, causing a crash. CVSS 4.0 is 4.6 with local attack vector and user interaction.
Likely exposure
Exposure is most likely where administrators, scripts, or automation run mdb_load against database dump files from untrusted or weakly controlled sources. Systems only running LDAP services without using mdb_load on attacker-influenced input appear less exposed based on the provided sources.
Exploitation context
The CVE is not listed as KEV, and the provided bundle does not show active exploitation. Public technical references are listed, including exploit-tagged Full Disclosure posts, so defenders should assume malformed test inputs may be publicly described without treating this as confirmed in-the-wild activity.
Researcher notes
The source bundle has some naming ambiguity: the title references OpenLDAP <= 2.6.10, while the description identifies LMDB through 0.9.14 before commit 8e1fda8. Validate against upstream bug 10421 and package backports before declaring systems fixed or vulnerable.
Mitigation direction
- Update LMDB/OpenLDAP packages when they include commit 8e1fda8 or a vendor backport.
- Do not process untrusted LMDB dump files with mdb_load.
- Restrict mdb_load access to trusted administrators and controlled automation.
- Monitor OpenLDAP bug 10421 and distribution advisories for packaged fixes.
Validation and detection
- Inventory systems with OpenLDAP LMDB mdb_load installed.
- Identify LMDB versions up to and including 0.9.14.
- Check package changelogs or vendor notes for commit 8e1fda8.
- Review automation that imports LMDB dumps from external or user-controlled sources.
- Confirm operational controls prevent untrusted dump files from reaching mdb_load.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-125: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-191: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-22185 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.6 (4.0)
- Known Exploited
- No
- Published
Vector: 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
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
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——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
4.6MediumVector: 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 materials
- CVE List V5 sourceCVE List V5
- https://seclists.org/fulldisclosure/2026/Jan/5CVE reference · technical-description, exploit
- https://seclists.org/fulldisclosure/2026/Jan/8CVE reference · technical-description, exploit
- https://www.openldap.org/CVE reference · product
- https://www.vulncheck.com/advisories/openldap-lmdb-mdb-load-heap-buffer-underflow-in-readlineCVE reference · third-party-advisory
- https://bugs.openldap.org/show_bug.cgi?id=10421CVE reference · issue-tracking, patch
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Integer Underflow (Wrap or Wraparound)
Integer Underflow (Wrap or Wraparound) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.