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CVE-2026-9064VulnerabilityPublished Updated

Red Hat Security Advisory: 389-ds-base security update

Affects Red Hat 389-ds-baseSource GCVE Database

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Authoritative record:CVE-2026-9064· High 7.5

Not known to be exploited · CVSS 7.5 High.

Data as of 6 Nov 2026, 03:03 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.

Sources agree

CVSS scores by source
CNA (redhat)CVSS 3.17.5
ADP (redhat-SADP)CVSS 3.17.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
389-ds-baseAffected
  • =0
Fixed in–
GitHub389-ds-basepkg:github/389-ds-baseOther threatsAffected
  • =0
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released an official security update for the 389-ds-base package on Red Hat Enterprise Linux 7 Extended Lifecycle Support to address this vulnerability. Users should apply the update as detailed in the Red Hat advisory (https://access.redhat.com/articles/11258) to remediate the issue. No other mitigation or workaround is indicated by the vendor advisory.

Description

A security vulnerability (CVE-2026-9064) in 389 Directory Server's LDAP implementation allows unbounded LDAP controls count in the get_ldapmessage_controls_ext() function, leading to CPU and heap amplification that can cause a remote denial of service (DoS). This issue affects Red Hat Enterprise Linux 7 Extended Lifecycle Support versions of 389-ds-base. Red Hat has issued an important security update to address this vulnerability.

References

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