CVEvulnerability
CVE-2026-11791
5.0 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2026-06-18
- Last modified
- 2026-06-30
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.0 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H
- CVSS 3.1 ([email protected])
- 5.0 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H
- Weaknesses
- CWE-416
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).
Affected configurations
• redhat directory server 11.0
• redhat directory server 12.0
• redhat directory server 13.0
• redhat 389 directory server
• redhat enterprise linux 7.0
• redhat enterprise linux 8.0
• redhat enterprise linux 9.0
• redhat enterprise linux 10.0
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- https://access.redhat.com/security/cve/CVE-2026-11791 Mitigation, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2485414 Issue Tracking, Vendor Advisory