CVE-2026-18453: 389-ds-base: pre-authentication null pointer dereference via paged results and use_one_backend control in op_shared_search
Red Hat · Red Hat Directory Server 11.5 E4S for RHEL 8
Vendor fix available · Affected: Red Hat Directory Server 11.5 E4S for RHEL 8 · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 58% of scored CVEs
DescriptionCVE.org
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 products20
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Red Hat · Red Hat Directory Server 11.5 E4S for RHEL 8Versions not stated
- Red Hat · Red Hat Directory Server 11.7 E4S for RHEL 8Versions not stated
- Red Hat · Red Hat Directory Server 11.9 for RHEL 8Versions not stated
- Red Hat · Red Hat Directory Server 12.2 E4S for RHEL 9Versions not stated
- Red Hat · Red Hat Directory Server 12.4 E4S for RHEL 9Versions not stated
- Red Hat · Red Hat Enterprise Linux 10Versions not stated
- Red Hat · Red Hat Enterprise Linux 10.0 Extended Update SupportVersions not stated
- Red Hat · Red Hat Enterprise Linux 7 Extended Lifecycle SupportVersions not stated
- Red Hat · Red Hat Enterprise Linux 8Versions not stated
- Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportVersions not stated
- Red Hat · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnVersions not stated
- Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportVersions not stated
- Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnVersions not stated
- Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceVersions not stated
- Red Hat · Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsVersions not stated
- Red Hat · Red Hat Enterprise Linux 9Versions not stated
- Red Hat · Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsVersions not stated
- Red Hat · Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsVersions not stated
- Red Hat · Red Hat Enterprise Linux 9.6 Extended Update SupportVersions not stated
- Red Hat · Red Hat Directory Server 13.2Versions not stated
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Red Hat
- Published
- September 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-18453 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.
References
- NVD entrynvd.nist.gov
- CVE recordcve.org
- Weakness CWE-476cwe.mitre.org
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
7 more references are in the CVE record.