CVE-2026-18453389-ds-base: 389-ds-base: pre-authentication null pointer dereference via paged results and use_one_backend control in op_shared_search
Updated under an hour ago ()
Does this affect you?
It affects Red Hat Directory Server 11.5 E4S for RHEL 8 and 9 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-476
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat Directory Server 11.5 E4S for RHEL 8 redhat:directory_server_e4s | from 8060020260908152739.0ca98e7e not affected | CNA record |
Red Hat Red Hat Directory Server 11.9 for RHEL 8 redhat:directory_server | from 8100020260904171440.37ed7c03 not affected | CNA record |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:3.2.0-10.el10_2 not affected | CNA record |
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus | from 0:3.0.6-21.el10_0 not affected | CNA record |
from 0:1.3.11.1-15.el7_9 not affected | CNA record | |
from 8040020260901171549.96015a92 not affected | CNA record | |
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support redhat:rhel_eus_long_life | from 8040020260901171549.96015a92 not affected | CNA record |
from 8080020260831180218.6dbb3803 not affected | CNA record | |
from 8080020260831180218.6dbb3803 not affected | CNA record | |
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus | from 0:2.6.1-24.el9_6 not affected | CNA record |
References
- https://access.redhat.com/errata/RHSA-2026:64771vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:64776vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:64778vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:64779vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:64780vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:64781vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:64783vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:64784vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:64785vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:64789vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:64790vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:64791vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:64792vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:64793vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:64804vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:65119vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:79217vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-18453vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2509696issue-tracking, x-refsource-redhat
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.