{"id":"UBUNTU-CVE-2026-22185","details":"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.","modified":"2026-05-20T16:24:12.483007033Z","published":"2026-01-07T21:16:00Z","upstream":["CVE-2026-22185"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-22185"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-22185"},{"type":"REPORT","url":"https://seclists.org/fulldisclosure/2026/Jan/5"},{"type":"REPORT","url":"https://seclists.org/fulldisclosure/2026/Jan/8"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/openldap-lmdb-mdb-load-heap-buffer-underflow-in-readline"}],"affected":[{"package":{"name":"lmdb","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/lmdb?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.15-1","0.9.16-1","0.9.17-1","0.9.17-3"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.17-3","binary_name":"liblmdb0"},{"binary_name":"lmdb-utils","binary_version":"0.9.17-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-22185.json"}},{"package":{"name":"lmdb","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/lmdb?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.21-1","0.9.21-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"liblmdb0","binary_version":"0.9.21-1ubuntu0.1"},{"binary_version":"0.9.21-1ubuntu0.1","binary_name":"lmdb-utils"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-22185.json"}},{"package":{"name":"lmdb","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/lmdb?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.23-0ubuntu1","0.9.24-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.24-1","binary_name":"liblmdb0"},{"binary_name":"lmdb-utils","binary_version":"0.9.24-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-22185.json"}},{"package":{"name":"lmdb","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/lmdb?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.24-1","0.9.24-1build1","0.9.24-1build2"],"ecosystem_specific":{"binaries":[{"binary_name":"liblmdb0","binary_version":"0.9.24-1build2"},{"binary_name":"lmdb-utils","binary_version":"0.9.24-1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-22185.json"}},{"package":{"name":"lmdb","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/lmdb?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.31-1","0.9.31-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"liblmdb0","binary_version":"0.9.31-1build1"},{"binary_name":"lmdb-utils","binary_version":"0.9.31-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-22185.json"}},{"package":{"name":"lmdb","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/lmdb?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.31-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.31-1build1","binary_name":"liblmdb0"},{"binary_version":"0.9.31-1build1","binary_name":"lmdb-utils"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-22185.json"}},{"package":{"name":"lmdb","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/lmdb?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.31-1build1","0.9.31-1build2"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.31-1build2","binary_name":"liblmdb0"},{"binary_name":"lmdb-utils","binary_version":"0.9.31-1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-22185.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","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":"Ubuntu","score":"medium"}]}