NULL Pointer Dereference Affecting 389-ds-base package, versions <0:2.8.0-10.el9_8


Severity

Recommended
critical

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.85% (56th percentile)

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  • Snyk IDSNYK-ALMALINUX9-389DSBASE-19675981
  • published11 Sept 2026
  • disclosed8 Sept 2026

Introduced: 8 Sep 2026

CVE-2026-18453  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 389-ds-base to version 0:2.8.0-10.el9_8 or higher.
This issue was patched in ALSA-2026:64784.

NVD Description

Note: Versions mentioned in the description apply only to the upstream 389-ds-base package and not the 389-ds-base package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

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 Base Scores

version 3.1