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CVE-2026-18663 (GCVE-0-2026-18663)

Vulnerability from cvelistv5 – Published: 2026-08-12 09:35 – Updated: 2026-08-13 15:41
VLAI
Title
389-ds-base: 389-ds-base: pre-authentication double-free in get_ldapmessage_controls_ext() via critical session tracking control
Summary
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.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 15:40 UTC
CWE
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-18663 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2510631 issue-trackingx_refsource_REDHAT
Impacted products
Date Public
2026-08-12 07:21
Show details on NVD website

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