CVE-2026-18453: Red Hat Directory Server 11.5 E4S for RHEL 8 (exact versions not specified); +22 more affected products

Affected technology

Red Hat Directory Server 11.5 E4S for RHEL 8 · Exact affected versions not specified by the source
Red Hat

Red Hat Directory Server 11.7 E4S for RHEL 8 · Exact affected versions not specified by the source
Red Hat

Red Hat Directory Server 11.9 for RHEL 8 · Exact affected versions not specified by the source
Red Hat

Red Hat Directory Server 12.2 E4S for RHEL 9 · Exact affected versions not specified by the source
Red Hat

Red Hat Directory Server 12.4 E4S for RHEL 9 · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux 10 · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux 10.0 Extended Update Support · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux 7 Extended Lifecycle Support · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux 8 · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux 8.8 Telecommunications Update Service · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux 9 · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux 9.6 Extended Update Support · Exact affected versions not specified by the source
Red Hat

Red Hat Directory Server 13.2 · Exact affected versions not specified by the source
Red Hat

Red Hat Directory Server 12 · Exact affected versions not specified by the source
Red Hat

Red Hat Directory Server 13 · Exact affected versions not specified by the source
Red Hat

Red Hat Enterprise Linux 6 · Exact affected versions not specified by the source
Red Hat

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

An unauthenticated remote attacker can crash the LDAP server by sending a crafted sequence of search requests using the USE_ONE_BACKEND control, resulting in denial of service. Vendor/CNA’s CVSS 3.1 assessment (base score 7.5/10) rates confidentiality and integrity impact as none; availability impact as high.