CVE-2026-11791: 389-ds-base: use-after-free in schema reload via attr_syntax_swap_ht()
Red Hat · Red Hat Directory Server 11
Affected: Red Hat Directory Server 11 · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 29% of scored CVEs
DescriptionCVE.org
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).
Affected products8
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Red Hat · Red Hat Directory Server 11Versions not stated
- Red Hat · Red Hat Directory Server 12Versions not stated
- Red Hat · Red Hat Directory Server 13Versions not stated
- Red Hat · Red Hat Enterprise Linux 10Versions not stated
- Red Hat · Red Hat Enterprise Linux 6Versions not stated
- Red Hat · Red Hat Enterprise Linux 7Versions not stated
- Red Hat · Red Hat Enterprise Linux 8Versions not stated
- Red Hat · Red Hat Enterprise Linux 9Versions not stated
On the Atlas
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CoverageNo articles yet
No CyberSIXT article names CVE-2026-11791 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.