{"id":"CVE-2026-18663","aliases":["DEBIAN-CVE-2026-18663","EUVD-2026-57153","GHSA-m545-9vp4-qjrp","UBUNTU-CVE-2026-18663","openSUSE-SU-2026:11739-1"],"status":"published","title":"389-ds-base: 389-ds-base: pre-authentication double-free in get_ldapmessage_controls_ext() via critical session tracking control","description":"A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function frees the parsed controls array on the Session Tracking critical-control rejection path without clearing the SLAPI_REQCONTROLS pblock slot. Operation teardown then frees the same pointer again, causing a double-free. An unauthenticated remote attacker can trigger this with a single BIND request carrying a critical Session Tracking control, resulting in heap corruption and potential denial of service.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00511,"percentile":0.43936,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-415"],"published":"2026-08-12T09:35:26Z","modified":"2026-11-05T20:17:53Z","affected":[{"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: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"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"389-ds","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.1+8c2711bd6-1.1"}]}],"bundled":8}],"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"}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-18663","tags":["vdb-entry","x_refsource_REDHAT","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2510631","tags":["issue-tracking","x_refsource_REDHAT","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18663"},{"url":"https://github.com/advisories/GHSA-m545-9vp4-qjrp"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-18663","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-18663","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-18663","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-11770","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-15722","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-18355","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-18453","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-18663","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-18922","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-19843","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-76560","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-18663","title":"389-ds-base: 389-ds-base: pre-authentication double-free in get_ldapmessage_controls_ext() via critical session tracking control","description":"A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function frees the parsed controls array on the Session Tracking critical-control rejection path without clearing the SLAPI_REQCONTROLS pblock slot. Operation teardown then frees the same pointer again, causing a double-free. An unauthenticated remote attacker can trigger this with a single BIND request carrying a critical Session Tracking control, resulting in heap corruption and potential denial of service.","status":"published","published":"2026-08-12T09:35:26.681Z","modified":"2026-11-05T19:25:43.74Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-415"],"updated_at":"2026-11-05T20:54:59.423743Z"}],"euvd":[{"id":"EUVD-2026-57153","description":"A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function frees the parsed controls array on the Session Tracking critical-control rejection path without clearing the SLAPI_REQCONTROLS pblock slot. Operation teardown then frees the same pointer again, causing a double-free. An unauthenticated remote attacker can trigger this with a single BIND request carrying a critical Session Tracking control, resulting in heap corruption and potential denial of service.","status":"published","published":"2026-08-12T09:35:26Z","modified":"2026-11-05T19:25:43Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-05T20:01:48.21368Z"}],"ghsa":[{"id":"GHSA-m545-9vp4-qjrp","title":"A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function frees the parsed...","description":"A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function frees the parsed controls array on the Session Tracking critical-control rejection path without clearing the SLAPI_REQCONTROLS pblock slot. Operation teardown then frees the same pointer again, causing a double-free. An unauthenticated remote attacker can trigger this with a single BIND request carrying a critical Session Tracking control, resulting in heap corruption and potential denial of service.","status":"published","published":"2026-08-12T12:32:54Z","modified":"2026-08-12T12:33:05Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-415"],"updated_at":"2026-11-02T15:10:22.198935Z"}],"nvd":[{"id":"CVE-2026-18663","description":"A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function frees the parsed controls array on the Session Tracking critical-control rejection path without clearing the SLAPI_REQCONTROLS pblock slot. Operation teardown then frees the same pointer again, causing a double-free. An unauthenticated remote attacker can trigger this with a single BIND request carrying a critical Session Tracking control, resulting in heap corruption and potential denial of service.","status":"published","published":"2026-08-12T10:17:18.437Z","modified":"2026-11-05T20:17:53.41Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-415"],"updated_at":"2026-11-05T21:56:42.883538Z"}],"osv":[{"id":"DEBIAN-CVE-2026-18663","description":"A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function frees the parsed controls array on the Session Tracking critical-control rejection path without clearing the SLAPI_REQCONTROLS pblock slot. Operation teardown then frees the same pointer again, causing a double-free. An unauthenticated remote attacker can trigger this with a single BIND request carrying a critical Session Tracking control, resulting in heap corruption and potential denial of service.","status":"published","published":"2026-08-12T10:17:18.437Z","modified":"2026-10-01T03:02:55.284528824Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:53.097669Z"},{"id":"UBUNTU-CVE-2026-18663","description":"A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function frees the parsed controls array on the Session Tracking critical-control rejection path without clearing the SLAPI_REQCONTROLS pblock slot. Operation teardown then frees the same pointer again, causing a double-free. An unauthenticated remote attacker can trigger this with a single BIND request carrying a critical Session Tracking control, resulting in heap corruption and potential denial of service.","status":"published","published":"2026-08-12T10:17:00Z","modified":"2026-10-17T12:59:54.035508128Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:56:01.334185Z"},{"id":"openSUSE-SU-2026:11739-1","title":"389-ds-3.3.1+8c2711bd6-1.1 on GA media","description":"These are all security issues fixed in the 389-ds-3.3.1+8c2711bd6-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-09-10T00:00:00Z","modified":"2026-09-11T18:23:07.838314864Z","updated_at":"2026-11-02T16:58:39.516824Z"}]}}