CVE-2026-11791Medium· 5.0▾ SunlitA flaw was found in 389 Directory Server. During schema reload, the attr_syntax_swap_ht() function unconditionally frees attribute syntax information nodes, bypassing the refcount-based deferred deletion used elsewhere in the attribute s…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 27.5 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.4%
Last analysed / modified upstream
A flaw was found in 389 Directory Server. During schema reload, the attr_syntax_swap_ht() function unconditionally frees attribute syntax information nodes, bypassing the refcount-based deferred deletion used elsewhere in the attribute syntax subsystem. If an administrator triggers schema reload while concurrent LDAP query traffic is active, worker threads may access freed memory, resulting in use-after-free or double-free and a denial of service (server crash).
redhat-ds:11/389-ds-base (all versions)redhat-ds:12/389-ds-base (all versions)389-ds-base (all versions)389-ds-base (all versions)389-ds-base389-ds-base (all versions)389-ds-base (all versions)389-ds-base (all versions)Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Schedule schema reload operations during maintenance windows with reduced LDAP traffic. Minimize schema reload frequency; in replication topologies schema changes propagate automatically. Monitor for unexpected ns-slapd restarts during or immediately after schema reloads. Restrict write access to cn=schema,cn=config to dedicated administrative accounts via LDAP ACIs.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-12528Medium· 5.4389-ds-base: 389-ds-base: heap-buffer-overflows in __aclp__normalize_acltxt()
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CVE-2026-11792Low· 3.3389-ds-base: 389-ds-base: heap buffer overflow in audit log password masking (create_masked_entry_string)
CVE-2026-15041Low· 3.7389-ds-base: 389-ds-base: non-constant-time comparison in pbkdf2-sha256 password verification
CVE-2026-18663Medium· 5.9389-ds-base: 389-ds-base: pre-authentication double-free in get_ldapmessage_controls_ext() via critical session tracking control
CVE-2026-16560Medium· 5.3389-ds-base: 389-ds-base: heap-buffer-overflow in rdn_av_swap on quoted multivalued rdn