CVE-2026-11791
MEDIUM EPSS 16.1%
Published Jun 18, 20262w ago · Modified Jun 22, 20261w ago
5.0 CVSS 3.1
Published Jun 18, 2026 2w ago
Last Modified Jun 22, 2026 1w ago
Description
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).
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H Attack Vector Network
Attack Complexity High
Privileges Required High
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Low
Availability High
Threat Intelligence
EPSS Exploit Probability
16.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-416 Use After Free Memory Safety
References 3
- access.redhat.com https://access.redhat.com/security/cve/CVE-2026-11791
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2485414
- redhat.atlassian.net https://redhat.atlassian.net/browse/PSIRTSUPT-7600
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.