7.5

CVE-2026-9064: redhat 389_directory_server

CVSS: 7.5v3.1HighModified
AliasesMGASA-2026-0310SUSE-SU-2026:22333-1SUSE-SU-2026:2316-1
Published 20-05-2026Last modified 21-08-2026
Open JSON

Vulnerability summary

CVE-2026-9064 is a high (CVSS 7.5) vulnerability in redhat 389_directory_server. EPSS estimates a 0.81% chance of exploitation in the next 30 days, higher than 56.3% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.81%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 20-05-2026
    PublishedVulnerability first disclosed.
  2. 21-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.81%

Chance of exploitation in the next 30 days

Percentile

56%

Versus all other CVEs

30-day change

0.00 pp

From 0.81% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.81%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Redhat17 products
  • 389_directory_serverna
  • directory_server11.0 | 12.0 | 13.0
  • enterprise_linuxEOL6.0 | 7.0 | 8.0 | 9.0 | 10.0
  • 389-ds-base< 0:2.2.4-18.el9_2 | < 0:1.3.11.1-12.el7_9 | < 0:1.4.3.35-18.module+el8.8.0+24377+19c5500b | < 0:2.8.0-7.el9_8 | < 0:3.2.0-7.el10_2 | < 0:3.0.6-18.el10_0 | < 0:1.4.3.39-24.module+el8dsrv+24341+2b6b9665 | < 0:1.4.3.39-24.module+el8.10.0+24340+7270ac72 | < 0:1.4.3.34-9.module+el8.6.0+24371+47116d61 | < 0:1.4.3.34-6.module+el8dsrv+24373+7e48d0d8 | < 0:1.4.3.34-4.module+el8.4.0+24372+0c6355a1 | < 0:2.4.5-25.el9_4 | < 0:2.6.1-21.el9_6 | < 0:1.4.3.34-15.module+el8dsrv+24378+c77f3fdd | < 0:2.4.5-23.module+el9dsrv+24381+1cd2f394 | < 0:2.2.7-15.module+el9dsrv+24397+ec2d72b6
  • 389-ds-base-bdb< 0:3.2.0-7.el10_2 | < 0:3.0.6-18.el10_0
Suse13 products
  • 389-ds&distro=SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS< 2.0.20~git90.9f70d434e-150400.3.51.1
  • 389-ds&distro=SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS< 2.0.20~git90.9f70d434e-150400.3.51.1
  • 389-ds&distro=SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS< 2.2.10~git229.1fa7ffdb4-150500.3.45.1
  • 389-ds&distro=SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS< 2.2.10~git229.1fa7ffdb4-150500.3.45.1
  • 389-ds&distro=SUSE Linux Enterprise Module for Server Applications 15 SP7< 2.7.0~git193.9ab79d496-150700.3.16.1
Opensuse2 products
  • 389-ds&distro=openSUSE Leap 16.0< 3.0.6~git337.647f49042-160000.1.1
  • 389-ds&distro=openSUSE Tumbleweed< 3.1.4+e9d94d45a-1.1
Debian1 product
  • 389-ds-baseAll versions (No fix recorded)
Mageia1 product
  • 389-ds-base< 3.1.3-2.1.mga10
Ubuntu1 product
  • 389-ds-baseAll versions (No fix recorded)

6 vendors · 35 products

References

54 links
Show all 54 references