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CVE-2026-11788

389-ds-base: 389-ds-base: null pointer dereference in deref control plugin ber parser

No known exploitation. EPSS puts it in the 46th percentile. Fixed versions are out.

CVSS 3.15.9MediumEPSS percentile46th0.6% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix5 products5 fixed builds listed below

Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Red Hat Directory Server 11.5 E4S for RHEL 8Fixed builds8060020260908152739.0ca98e7eStated by: CVE record
  • Red Hat Directory Server 11.7 E4S for RHEL 8Fixed builds8080020260806114250.f969626eStated by: CVE record
  • Red Hat Directory Server 11.9 for RHEL 8Fixed builds8100020260803140625.37ed7c03Stated by: CVE record
  • Red Hat Directory Server 12.2 E4S for RHEL 9Fixed builds9020020260730155601.1674d574Stated by: CVE record
  • Red Hat Directory Server 12.4 E4S for RHEL 9Fixed builds9040020260810131422.1674d574Stated by: CVE record

Versions as the sources state them. 12 more products have version data. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

A flaw was found in 389 Directory Server. The dereference control plugin does not check for allocation failure before using a BER structure, allowing an unauthenticated remote attacker to crash the LDAP server when the system is under memory pressure.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS46th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

0.6% chance of exploitation activity in the next 30 days, which ranks it in the 46th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

34 events over 121 days, from the signal feeds we watch.

  1. Patch availableworkaround available, record updated
  2. Patch availablepatch available, workaround available, workaround available, record updated, record updated
  3. Patch availablepatch available, patch available, patch available, patch available, workaround available, workaround available, workaround available, workaround available, workaround available, record updated, record updated, record updated, record updated, record updated
  4. OpenVAS check addedpatch available, workaround available, record updated
  5. Patch availableworkaround available, record updated
  6. Publishedweakness classified, att&ck mapped

Affected products

And 17 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Scored 5.9 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality NoneNo confidentiality impact
  • Integrity NoneNo integrity impact
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 15 more references. See all after sign-in

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We'll flag the next CVE, public exploit or patch for Directory Server, not every advisory.