{"id":"CVE-2026-14940","aliases":["AZL-92189","DEBIAN-CVE-2026-14940","EUVD-2026-42042","GHSA-868f-j5w9-5jgm","UBUNTU-CVE-2026-14940"],"status":"published","title":"389-ds-base: 389-ds-base: heap-buffer-overflow in dn normalization via quoted multivalued rdn","description":"A heap-buffer-overflow flaw was found in 389 Directory Server (389-ds-base). When\nnormalizing a Distinguished Name (DN) that contains a legacy-quoted value encoding a\nmultivalued nested Relative Distinguished Name (RDN), the server can write past the\nend of a heap allocation while sorting RDN attribute-value pairs. An unauthenticated\nremote attacker can trigger this condition by sending an LDAP operation whose DN\nreaches the DN normalization routine, such as a search with a crafted base DN. This\ncan corrupt heap memory and may cause denial of service.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00487,"percentile":0.4223,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122"],"published":"2026-07-07T13:54:20Z","modified":"2026-11-05T05:36:30Z","affected":[{"source":"osv","ecosystem":"Azure Linux:3","package":"389-ds-base","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"3.1.1-12"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"389-ds-base","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.1+dfsg1-1","2.3.1+dfsg1-1+deb12u1","2.3.4+dfsg1-1","2.3.4+dfsg1-1.1","2.4.4+dfsg1-1","2.4.4+dfsg1-3","2.4.5+dfsg1-1","3.0.2+dfsg1-1","3.1.1+dfsg1-1","3.1.1+dfsg1-2","3.1.1+dfsg1-3","3.1.2+dfsg1-1","3.1.2+vendor1-1","3.1.2+vendor1-2","3.3.0-1","3.3.0-2","3.3.1-1","3.3.1-3"]},{"source":"osv","ecosystem":"Debian:13","package":"389-ds-base","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2+dfsg1-1","3.1.2+dfsg1-1+deb13u1","3.1.2+vendor1-1","3.1.2+vendor1-2","3.3.0-1","3.3.0-2","3.3.1-1","3.3.1-3"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"389-ds-base","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.3.12-1build1","1.3.3.13-1","1.3.4.5-2","1.3.4.8-1","1.3.4.8-3","1.3.4.8-3ubuntu1","1.3.4.8-4","1.3.4.9-1","1.3.4.9-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"389-ds-base","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.7.5-1","1.3.7.5-1build1","1.3.7.5-1build2","1.3.7.9-1","1.3.7.10-1","1.3.7.10-1ubuntu1","1.3.7.10-1ubuntu1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"389-ds-base","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.1.6-4","1.4.1.6-4build1","1.4.2.4-1","1.4.2.4-1build1","1.4.3.2-1","1.4.3.2-1build1","1.4.3.6-2","1.4.3.6-2ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"389-ds-base","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.4.11-2build1","1.4.4.11-2build2","1.4.4.17-1","2.0.11-2","2.0.14-1","2.0.15-1","2.0.15-1ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"389-ds-base","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.4+dfsg1-1","2.4.4+dfsg1-1ubuntu1","2.4.4+dfsg1-1ubuntu4","2.4.4+dfsg1-3","2.4.5+dfsg1-1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"389-ds-base","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2+dfsg1-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"389-ds-base","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2+vendor1-2","3.1.2+vendor1-2build1","3.3.1-3"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"389-ds-base","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2+dfsg1-1","3.1.2+vendor1-2"]}],"products":[{"vendor":"red hat","product":"red hat directory server 11"},{"vendor":"red hat","product":"red hat directory server 12"},{"vendor":"red hat","product":"red hat directory server 13"},{"vendor":"red hat","product":"red hat enterprise linux 10"},{"vendor":"red hat","product":"red hat enterprise linux 6"},{"vendor":"red hat","product":"red hat enterprise linux 7"},{"vendor":"red hat","product":"red hat enterprise linux 8"},{"vendor":"red hat","product":"red hat enterprise linux 9"},{"vendor":"redhat","product":"389_directory_server"},{"vendor":"redhat","product":"directory_server"},{"vendor":"redhat","product":"enterprise_linux"}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-14940","tags":["vdb-entry","x_refsource_REDHAT","Vendor Advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2497697","tags":["issue-tracking","x_refsource_REDHAT","Issue Tracking","Vendor Advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-14940","tags":["web"]},{"url":"https://github.com/advisories/GHSA-868f-j5w9-5jgm"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-14940","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-14940","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-14940","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-14940","title":"389-ds-base: 389-ds-base: heap-buffer-overflow in dn normalization via quoted multivalued rdn","description":"A heap-buffer-overflow flaw was found in 389 Directory Server (389-ds-base). When\nnormalizing a Distinguished Name (DN) that contains a legacy-quoted value encoding a\nmultivalued nested Relative Distinguished Name (RDN), the server can write past the\nend of a heap allocation while sorting RDN attribute-value pairs. An unauthenticated\nremote attacker can trigger this condition by sending an LDAP operation whose DN\nreaches the DN normalization routine, such as a search with a crafted base DN. This\ncan corrupt heap memory and may cause denial of service.","status":"published","published":"2026-07-07T13:54:20.688Z","modified":"2026-11-05T16:41:44.076Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-05T17:53:58.925122Z"}],"euvd":[{"id":"EUVD-2026-42042","description":"A heap-buffer-overflow flaw was found in 389 Directory Server (389-ds-base). When\nnormalizing a Distinguished Name (DN) that contains a legacy-quoted value encoding a\nmultivalued nested Relative Distinguished Name (RDN), the server can write past the\nend of a heap allocation while sorting RDN attribute-value pairs. An unauthenticated\nremote attacker can trigger this condition by sending an LDAP operation whose DN\nreaches the DN normalization routine, such as a search with a crafted base DN. This\ncan corrupt heap memory and may cause denial of service.","status":"published","published":"2026-07-07T13:54:20Z","modified":"2026-11-05T16:41:44Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-05T18:00:57.863749Z"}],"ghsa":[{"id":"GHSA-868f-j5w9-5jgm","title":"A heap-buffer-overflow flaw was found in 389 Directory Server (389-ds-base). When\nnormalizing a...","description":"A heap-buffer-overflow flaw was found in 389 Directory Server (389-ds-base). When\nnormalizing a Distinguished Name (DN) that contains a legacy-quoted value encoding a\nmultivalued nested Relative Distinguished Name (RDN), the server can write past the\nend of a heap allocation while sorting RDN attribute-value pairs. An unauthenticated\nremote attacker can trigger this condition by sending an LDAP operation whose DN\nreaches the DN normalization routine, such as a search with a crafted base DN. This\ncan corrupt heap memory and may cause denial of service.","status":"published","published":"2026-07-07T15:32:57Z","modified":"2026-07-07T15:33:03Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:09:18.163038Z"}],"nvd":[{"id":"CVE-2026-14940","description":"A heap-buffer-overflow flaw was found in 389 Directory Server (389-ds-base). When\nnormalizing a Distinguished Name (DN) that contains a legacy-quoted value encoding a\nmultivalued nested Relative Distinguished Name (RDN), the server can write past the\nend of a heap allocation while sorting RDN attribute-value pairs. An unauthenticated\nremote attacker can trigger this condition by sending an LDAP operation whose DN\nreaches the DN normalization routine, such as a search with a crafted base DN. This\ncan corrupt heap memory and may cause denial of service.","status":"published","published":"2026-07-07T15:16:43.193Z","modified":"2026-11-05T17:18:08.113Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"primary"}],"cwes":["CWE-122"],"updated_at":"2026-11-05T19:55:55.702046Z"}],"osv":[{"id":"DEBIAN-CVE-2026-14940","description":"A heap-buffer-overflow flaw was found in 389 Directory Server (389-ds-base). When normalizing a Distinguished Name (DN) that contains a legacy-quoted value encoding a multivalued nested Relative Distinguished Name (RDN), the server can write past the end of a heap allocation while sorting RDN attribute-value pairs. An unauthenticated remote attacker can trigger this condition by sending an LDAP operation whose DN reaches the DN normalization routine, such as a search with a crafted base DN. This can corrupt heap memory and may cause denial of service.","status":"published","published":"2026-07-07T15:16:43.193Z","modified":"2026-10-01T03:02:49.735778825Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:45:51.8748Z"},{"id":"UBUNTU-CVE-2026-14940","description":"A heap-buffer-overflow flaw was found in 389 Directory Server (389-ds-base). When normalizing a Distinguished Name (DN) that contains a legacy-quoted value encoding a multivalued nested Relative Distinguished Name (RDN), the server can write past the end of a heap allocation while sorting RDN attribute-value pairs. An unauthenticated remote attacker can trigger this condition by sending an LDAP operation whose DN reaches the DN normalization routine, such as a search with a crafted base DN. This can corrupt heap memory and may cause denial of service.","status":"published","published":"2026-07-07T15:16:00Z","modified":"2026-10-17T12:59:53.20399941Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T16:56:00.592716Z"},{"id":"AZL-92189","title":"CVE-2026-14940 affecting package 389-ds-base 3.1.1-12","description":"A heap-buffer-overflow flaw was found in 389 Directory Server (389-ds-base). When\nnormalizing a Distinguished Name (DN) that contains a legacy-quoted value encoding a\nmultivalued nested Relative Distinguished Name (RDN), the server can write past the\nend of a heap allocation while sorting RDN attribute-value pairs. An unauthenticated\nremote attacker can trigger this condition by sending an LDAP operation whose DN\nreaches the DN normalization routine, such as a search with a crafted base DN. This\ncan corrupt heap memory and may cause denial of service.","status":"published","published":"2026-07-07T15:16:43Z","modified":"2026-11-05T05:36:30Z","updated_at":"2026-11-05T16:41:25.880689Z"}]}}