CVE-2026-22185
CVE-2026-22185 is a medium-severity vulnerability with a CVSS 4.0 base score of 4.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.
Key facts
- Severity: Medium (CVSS 4.0 base score 4.6)
- EPSS exploit prediction: 0% (3rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-1169
- Weakness: CWE-125
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-22185?
- 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.
- How severe is CVE-2026-22185?
- CVE-2026-22185 has a CVSS 4.0 base score of 4.6, rated medium severity.
- Is CVE-2026-22185 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-22185?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-22185 have an EU (EUVD) identifier?
- Yes. CVE-2026-22185 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1169.
- When was CVE-2026-22185 published?
- CVE-2026-22185 was published on 2026-01-07 and last updated on 2026-06-17.
References
- https://bugs.openldap.org/show_bug.cgi?id=10421
- https://seclists.org/fulldisclosure/2026/Jan/5
- https://seclists.org/fulldisclosure/2026/Jan/8
- https://www.openldap.org/
- https://www.vulncheck.com/advisories/openldap-lmdb-mdb-load-heap-buffer-underflow-in-readline
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