Riskcovery

CVE-2026-9064

389-ds-base: 389-ds-base: unbounded ldap controls count in get_ldapmessage_controls_ext() causes cpu and heap amplification (remote dos)

State
Published
Severity
7.5 High
Published
May 20, 2026
Updated
Aug 21, 2026
Reserved
May 20, 2026

Read the record on cve.org

Description

A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function in the LDAP server does not enforce an upper bound on the number of controls per LDAP message. A remote, unauthenticated attacker can send a specially crafted LDAP request containing hundreds of thousands of minimal controls within the default maximum BER message size (2 MB), causing excessive CPU consumption and heap allocation on the server. Under concurrent exploitation, this leads to significant latency degradation, worker thread starvation, or out-of-memory termination, resulting in a denial of service.

Scores

CVSSScoreVectorSource
3.17.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hredhat
3.17.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hredhat-SADP

Weaknesses

  • CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

ProductVersions
389-ds-base
  • 0Affected
Red Hat Directory Server 11.5 E4S for RHEL 8Red Hat
  • 8060020260609102432.0ca98e7e and laterNot affected
Red Hat Directory Server 11.7 E4S for RHEL 8Red Hat
  • 8080020260610130252.f969626e and laterNot affected
Red Hat Directory Server 11.9 for RHEL 8Red Hat
  • 8100020260601104139.37ed7c03 and laterNot affected
Red Hat Directory Server 12.2 E4S for RHEL 9Red Hat
  • 9020020260615123354.1674d574 and laterNot affected
Red Hat Directory Server 12.4 E4S for RHEL 9Red Hat
  • 9040020260611130021.1674d574 and laterNot affected
Red Hat Enterprise Linux 10Red Hat
  • 0:3.2.0-7.el10_2 and laterNot affected
Red Hat Enterprise Linux 10.0 Extended Update SupportRed Hat
  • 0:3.0.6-18.el10_0 and laterNot affected
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRed Hat
  • 0:1.3.11.1-12.el7_9 and laterNot affected
Red Hat Enterprise Linux 8Red Hat
  • 8100020260601102239.25e700aa and laterNot affected
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat
  • 8040020260609102422.96015a92 and laterNot affected
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRed Hat
  • 8040020260609102422.96015a92 and laterNot affected
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat
  • 8060020260609102416.824efc52 and laterNot affected
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnRed Hat
  • 8060020260609102416.824efc52 and laterNot affected
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat
  • 8080020260610125847.6dbb3803 and laterNot affected
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat
  • 8080020260610125847.6dbb3803 and laterNot affected
Red Hat Enterprise Linux 9Red Hat
  • 0:2.8.0-7.el9_8 and laterNot affected
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat
  • 0:2.2.4-18.el9_2 and laterNot affected
Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsRed Hat
  • 0:2.4.5-25.el9_4 and laterNot affected
Red Hat Enterprise Linux 9.6 Extended Update SupportRed Hat
  • 0:2.6.1-21.el9_6 and laterNot affected
Red Hat Directory Server 13.2Red Hat
  • 1781714123 and laterNot affected
Red Hat Directory Server 12Red Hat
    Red Hat Directory Server 13Red Hat
      Red Hat Enterprise Linux 6Red Hat

        References

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