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AlmaLinux 9 : 389-ds-base (ALSA-2026:26455)

high Nessus Plugin ID 324831

Synopsis

The remote AlmaLinux host is missing a security update.

Description

The remote AlmaLinux 9 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2026:26455 advisory.

 * 389-ds-base: 389-ds-base: unbounded LDAP controls count in get_ldapmessage_controls_ext() causes CPU and heap amplification (remote DoS) (CVE-2026-9064)


 Bug Fix(es) and Enhancement(s):

 * Getting build_candidate_list - Database error 11 messages after migrating to LMDB. [almalinux-9.8.z] (JIRA:AlmaLinux-152356)
 * Web console doesn't show the sub suffix of ou=foo,ou=people,dc=example,dc=com. [almalinux-9.8.z] (JIRA:AlmaLinux-168967)
 * DS 12 does not handle escape char in bind user [almalinux-9.8.z] (JIRA:AlmaLinux-170269)
 * [RFE] Add OS-level thread names to all server threads [almalinux-9.8.z] (JIRA:AlmaLinux-174524)
 * Online export is failing when using the option -s [almalinux-9.8.z] (JIRA:AlmaLinux-180716)
 * Server shutdown during online reindex may lead to data loss [almalinux-9.8.z] (JIRA:AlmaLinux-183895)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://access.redhat.com/errata/RHSA-2026:26455

https://errata.almalinux.org/9/ALSA-2026-26455.html

Plugin Details

Severity: High

ID: 324831

File Name: alma_linux_ALSA-2026-26455.nasl

Version: 1.1

Type: Local

Published: 7/2/2026

Updated: 7/2/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.76

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-9064

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:alma:linux:9::crb, cpe:/o:alma:linux:9::highavailability, cpe:/o:alma:linux:9::resilientstorage, cpe:/o:alma:linux:9::appstream, cpe:/o:alma:linux:9::realtime, p-cpe:/a:alma:linux:389-ds-base-devel, cpe:/o:alma:linux:9, cpe:/o:alma:linux:9::sap_hana, p-cpe:/a:alma:linux:python3-lib389, cpe:/o:alma:linux:9::supplementary, p-cpe:/a:alma:linux:389-ds-base-libs, cpe:/o:alma:linux:9::sap, p-cpe:/a:alma:linux:389-ds-base-snmp, p-cpe:/a:alma:linux:389-ds-base, cpe:/o:alma:linux:9::nfv, cpe:/o:alma:linux:9::baseos

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 6/17/2026

Vulnerability Publication Date: 5/20/2026

Reference Information

CVE: CVE-2026-9064

CWE: 770

RHSA: 2026:26455