VULNERABILITY INTELLIGENCE
CVE-2026-18663
CVSS score5.9 MEDIUM
EPSS probability0.51%
CISA KEVNot currently listed
Published2026-08-12
Last modified2026-08-14
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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.
Weakness classification
- secalert@redhat.com: CWE-415