CVE-2026-18453
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | 0:1.3.11.1-15.el7_9 < * | unaffected |
Weaknesses
- CWE-476: NULL Pointer Dereference
Workarounds
Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.
References
- https://access.redhat.com/errata/RHSA-2026:64771
- https://access.redhat.com/security/cve/CVE-2026-18453
- https://bugzilla.redhat.com/show_bug.cgi?id=2509696
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