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.

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Produits concernés

• Red Hat Directory Server 11
• Red Hat Directory Server 12
• Red Hat Directory Server 13
• Red Hat Enterprise Linux 10
• Red Hat Enterprise Linux 6
• Red Hat Enterprise Linux 7
• Red Hat Enterprise Linux 8
• Red Hat Enterprise Linux 9

Scores CVSS

Faiblesses (CWE)

• CWE-415

Références

• https://access.redhat.com/security/cve/CVE-2026-18663
• https://bugzilla.redhat.com/show_bug.cgi?id=2510631

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories