389-ds-base: 389-ds-base: pre-authentication null pointer dereference via paged results and use_one_backend control in op_shared_search
Published Sep 7, 2026 · Updated Nov 3, 2026
Original summary
Normalized public record · Updated Nov 3, 2026
389-ds-base: 389-ds-base: pre-authentication null pointer dereference via paged results and use_one_backend control in op_shared_search
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
A flaw was found in 389 Directory Server. A missing NULL pointer check in the paged results handling of op_shared_search allows an unauthenticated remote attacker to crash the LDAP server by sending a crafted sequence of search requests using the USE_ONE_BACKEND control, resulting in denial of service.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- Not available
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- RHSA-2026:64771 ↗
- RHSA-2026:64776 ↗
- RHSA-2026:64778 ↗
- RHSA-2026:64779 ↗
- RHSA-2026:64780 ↗
- RHSA-2026:64781 ↗
- RHSA-2026:64783 ↗
- RHSA-2026:64784 ↗
- RHSA-2026:64785 ↗
- RHSA-2026:64789 ↗
- RHSA-2026:64790 ↗
- RHSA-2026:64791 ↗
Record history
Published Sep 7, 2026 · Last refreshed Nov 3, 2026