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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, 03:02 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 updated 389-ds-base packages for Red Hat Enterprise Linux 9.6 Extended Update Support and related variants that fix this vulnerability. Users should apply these official updates as detailed in the Red Hat advisory (https://access.redhat.com/articles/11258) to remediate the issue. No other mitigation or workaround is specified.

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, causing CPU and heap amplification that can lead to a remote denial of service (DoS). This issue affects Red Hat Enterprise Linux 9.6 Extended Update Support and related variants. Red Hat has released an update to address this vulnerability.

References

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