Vulnerability-Lookup

OESA-2026-3283 (CVE-2026-22185)

Vulnerability from osv_openeuler – Published: 2026-08-07 02:43 – Updated: 2026-08-07 02:43 – Source website

Summary

lmdb security update

Details

Symas LMDB is an extraordinarily fast, memory-efficient database we developed for the OpenLDAP Project. With memory-mapped files, it has the read performance of a pure in-memory database while retaining the persistence of standard disk-based databases.

Security Fix(es):

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.(CVE-2026-22185)

Severity

4.6 (Medium)


                    
                      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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-22185	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "lmdb-0.9.31-3.oe2403sp1.aarch64.rpm",
          "lmdb-debuginfo-0.9.31-3.oe2403sp1.aarch64.rpm",
          "lmdb-debugsource-0.9.31-3.oe2403sp1.aarch64.rpm",
          "lmdb-devel-0.9.31-3.oe2403sp1.aarch64.rpm"
        ],
        "noarch": [
          "lmdb-help-0.9.31-3.oe2403sp1.noarch.rpm"
        ],
        "src": [
          "lmdb-0.9.31-3.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "lmdb-0.9.31-3.oe2403sp1.x86_64.rpm",
          "lmdb-debuginfo-0.9.31-3.oe2403sp1.x86_64.rpm",
          "lmdb-debugsource-0.9.31-3.oe2403sp1.x86_64.rpm",
          "lmdb-devel-0.9.31-3.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "lmdb",
        "purl": "pkg:rpm/openEuler/lmdb\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.9.31-3.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "lmdb-0.9.31-3.oe2403sp3.aarch64.rpm",
          "lmdb-debuginfo-0.9.31-3.oe2403sp3.aarch64.rpm",
          "lmdb-debugsource-0.9.31-3.oe2403sp3.aarch64.rpm",
          "lmdb-devel-0.9.31-3.oe2403sp3.aarch64.rpm"
        ],
        "noarch": [
          "lmdb-help-0.9.31-3.oe2403sp3.noarch.rpm"
        ],
        "src": [
          "lmdb-0.9.31-3.oe2403sp3.src.rpm"
        ],
        "x86_64": [
          "lmdb-0.9.31-3.oe2403sp3.x86_64.rpm",
          "lmdb-debuginfo-0.9.31-3.oe2403sp3.x86_64.rpm",
          "lmdb-debugsource-0.9.31-3.oe2403sp3.x86_64.rpm",
          "lmdb-devel-0.9.31-3.oe2403sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP3",
        "name": "lmdb",
        "purl": "pkg:rpm/openEuler/lmdb\u0026distro=openEuler-24.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.9.31-3.oe2403sp3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "lmdb-0.9.31-3.oe2403sp4.aarch64.rpm",
          "lmdb-debuginfo-0.9.31-3.oe2403sp4.aarch64.rpm",
          "lmdb-debugsource-0.9.31-3.oe2403sp4.aarch64.rpm",
          "lmdb-devel-0.9.31-3.oe2403sp4.aarch64.rpm"
        ],
        "noarch": [
          "lmdb-help-0.9.31-3.oe2403sp4.noarch.rpm"
        ],
        "src": [
          "lmdb-0.9.31-3.oe2403sp4.src.rpm"
        ],
        "x86_64": [
          "lmdb-0.9.31-3.oe2403sp4.x86_64.rpm",
          "lmdb-debuginfo-0.9.31-3.oe2403sp4.x86_64.rpm",
          "lmdb-debugsource-0.9.31-3.oe2403sp4.x86_64.rpm",
          "lmdb-devel-0.9.31-3.oe2403sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP4",
        "name": "lmdb",
        "purl": "pkg:rpm/openEuler/lmdb\u0026distro=openEuler-24.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.9.31-3.oe2403sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "lmdb-0.9.24-5.oe2003sp4.aarch64.rpm",
          "lmdb-debuginfo-0.9.24-5.oe2003sp4.aarch64.rpm",
          "lmdb-debugsource-0.9.24-5.oe2003sp4.aarch64.rpm",
          "lmdb-devel-0.9.24-5.oe2003sp4.aarch64.rpm"
        ],
        "noarch": [
          "lmdb-help-0.9.24-5.oe2003sp4.noarch.rpm"
        ],
        "src": [
          "lmdb-0.9.24-5.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "lmdb-0.9.24-5.oe2003sp4.x86_64.rpm",
          "lmdb-debuginfo-0.9.24-5.oe2003sp4.x86_64.rpm",
          "lmdb-debugsource-0.9.24-5.oe2003sp4.x86_64.rpm",
          "lmdb-devel-0.9.24-5.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "lmdb",
        "purl": "pkg:rpm/openEuler/lmdb\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.9.24-5.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "lmdb-0.9.30-3.oe2203sp4.aarch64.rpm",
          "lmdb-debuginfo-0.9.30-3.oe2203sp4.aarch64.rpm",
          "lmdb-debugsource-0.9.30-3.oe2203sp4.aarch64.rpm",
          "lmdb-devel-0.9.30-3.oe2203sp4.aarch64.rpm"
        ],
        "noarch": [
          "lmdb-help-0.9.30-3.oe2203sp4.noarch.rpm"
        ],
        "src": [
          "lmdb-0.9.30-3.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "lmdb-0.9.30-3.oe2203sp4.x86_64.rpm",
          "lmdb-debuginfo-0.9.30-3.oe2203sp4.x86_64.rpm",
          "lmdb-debugsource-0.9.30-3.oe2203sp4.x86_64.rpm",
          "lmdb-devel-0.9.30-3.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "lmdb",
        "purl": "pkg:rpm/openEuler/lmdb\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.9.30-3.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "Symas LMDB is an extraordinarily fast, memory-efficient database we developed for the OpenLDAP Project. With memory-mapped files, it has the read performance of a pure in-memory database while retaining the persistence of standard disk-based databases.\r\n\r\nSecurity Fix(es):\n\nOpenLDAP 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.(CVE-2026-22185)",
  "id": "OESA-2026-3283",
  "modified": "2026-08-07T02:43:33Z",
  "published": "2026-08-07T02:43:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3283"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22185"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "lmdb security update",
  "upstream": [
    "CVE-2026-22185"
  ]
}

CVE-2026-22185 (GCVE-0-2026-22185)

Vulnerability from cvelistv5 – Published: 2026-01-07 20:26 – Updated: 2026-05-25 23:41

Title

OpenLDAP LMDB mdb_load Heap Buffer Underflow in readline()

Summary

Severity

4.6 (Medium)


                        
                          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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-07 21:25 UTC

CWE

CWE-125 - Out-of-bounds Read
CWE-191 - Integer Underflow (Wrap or Wraparound)

Assigner

VulnCheck mitre root Scorecard

References

5 references

URL	Tags
https://seclists.org/fulldisclosure/2026/Jan/5	technical-descriptionexploit
https://seclists.org/fulldisclosure/2026/Jan/8	technical-descriptionexploit
https://www.openldap.org/	product
https://www.vulncheck.com/advisories/openldap-lmd…	third-party-advisory
https://bugs.openldap.org/show_bug.cgi?id=10421	issue-trackingpatch

Impacted products

1 product

Vendor	Product	Version
OpenLDAP Foundation	OpenLDAP	Affected: 0.9.14 , < 0.9.34 (semver) cpe:2.3:a:openldap:openldap::::::::

Credits

Ron Edgerson

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-22185",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-07T21:25:36.753538Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-07T21:25:58.538Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "OpenLDAP",
          "vendor": "OpenLDAP Foundation",
          "versions": [
            {
              "lessThan": "0.9.34",
              "status": "affected",
              "version": "0.9.14",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:openldap:openldap:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "0.9.34",
                  "versionStartIncluding": "0.9.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Ron Edgerson"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "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."
            }
          ],
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 4.6,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "ACTIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
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      "problemTypes": [
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          "descriptions": [
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              "cweId": "CWE-125",
              "description": "CWE-125 Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
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          ]
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        {
          "descriptions": [
            {
              "cweId": "CWE-191",
              "description": "CWE-191 Integer Underflow (Wrap or Wraparound)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-25T23:41:35.137Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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      "references": [
        {
          "tags": [
            "technical-description",
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          "url": "https://seclists.org/fulldisclosure/2026/Jan/5"
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        {
          "tags": [
            "technical-description",
            "exploit"
          ],
          "url": "https://seclists.org/fulldisclosure/2026/Jan/8"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://www.openldap.org/"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/openldap-lmdb-mdb-load-heap-buffer-underflow-in-readline"
        },
        {
          "tags": [
            "issue-tracking",
            "patch"
          ],
          "url": "https://bugs.openldap.org/show_bug.cgi?id=10421"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "OpenLDAP LMDB mdb_load Heap Buffer Underflow in readline()",
      "x_generator": {
        "engine": "vulncheck"
      }
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  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
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    "datePublished": "2026-01-07T20:26:30.054Z",
    "dateReserved": "2026-01-06T16:47:17.182Z",
    "dateUpdated": "2026-05-25T23:41:35.137Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Action not permitted

OESA-2026-3283 (CVE-2026-22185)

CVE-2026-22185 (GCVE-0-2026-22185)

Tags

Sightings

Nomenclature

Related by attack behaviour