Status: UPDATED | Advisory ID: CVE-2026-18453
| CVE | CVE-2026-18453 |
| CVSS Score / Version | 7.5 (High) / CVSS v3.1 |
| Updated | 2026-10-08 |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CVSS Prose | attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is none; integrity impact is none; availability impact is high. |
| Affected products | see table below |
| Classified as | CWE-476 (NULL Pointer Dereference) |
| Vendor | Product | Affected Versions | Patch Status |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | ||
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | ||
| Red Hat | Red Hat Enterprise Linux 8 | ||
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | ||
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | ||
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | ||
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | ||
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | ||
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | ||
| Red Hat | Red Hat Enterprise Linux 9 | ||
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | ||
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | ||
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | ||
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | ||
| Red Hat | Red Hat Directory Server 12 | ||
| Red Hat | Red Hat Directory Server 11.5 E4S for RHEL 8 | ||
| Red Hat | Red Hat Directory Server 11.7 E4S for RHEL 8 | ||
| Red Hat | Red Hat Directory Server 11.9 for RHEL 8 | ||
| Red Hat | Red Hat Directory Server 12.2 E4S for RHEL 9 | ||
| Red Hat | Red Hat Directory Server 12.4 E4S for RHEL 9 | ||
| Red Hat | Red Hat Directory Server 13.2 |
| Subsystems | OT Supporting Infrastructure |
| Sectors | Multiple |
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. (NVD)
Monitor Red Hat's web page for any future patch releases.
| Source | Reference |
|---|---|
| NVD | https://nvd.nist.gov/vuln/detail/CVE-2026-18453 |
| CVE | https://www.cve.org/CVERecord?id=CVE-2026-18453 |