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01 Record

CVE-2026-18355

389-ds-base: 389-ds-base: heap buffer overflow via sasl wrapped-record length lower-bound underflow in sasl_io_start_packet()

HighPUBLISHEDCNA: redhat
CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
View raw JSON

02 Description

389-ds-base: 389-ds-base: heap buffer overflow via sasl wrapped-record length lower-bound underflow in sasl_io_start_packet()

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.83% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 57.5% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-10-08.
Red Hat severity
Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-09-07 14:14Z1 MO AGO
Last updated
2026-10-08 14:14Z20 DAYS AGO
Reserved
2026-07-30
Assigning CNA
redhat
Record state
PUBLISHED
Severity
High (CVSS 7.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
  • CWE-191Integer Underflow (Wrap or Wraparound)Base
Data version
5.2
Document digest
c263a0581e946450ee7d8374937c950fdc9a7253e26e291fb9d790c23736ad77

05 Affected products

VendorProductVersionsPlatforms
Red HatRed Hat Directory Server 11.5 E4S for RHEL 8Not specified—
Red HatRed Hat Directory Server 11.7 E4S for RHEL 8Not specified—
Red HatRed Hat Directory Server 11.9 for RHEL 8Not specified—
Red HatRed Hat Directory Server 12.2 E4S for RHEL 9Not specified—
Red HatRed Hat Directory Server 12.4 E4S for RHEL 9Not specified—
Red HatRed Hat Enterprise Linux 10Not specified—
Red HatRed Hat Enterprise Linux 10.0 Extended Update SupportNot specified—
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle SupportNot specified—
Red HatRed Hat Enterprise Linux 8Not specified—
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportNot specified—
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnNot specified—
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportNot specified—
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnNot specified—
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update ServiceNot specified—
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP SolutionsNot specified—
Red HatRed Hat Enterprise Linux 9Not specified—
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP SolutionsNot specified—
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP SolutionsNot specified—
Red HatRed Hat Enterprise Linux 9.6 Extended Update SupportNot specified—
Red HatRed Hat Directory Server 13.2Not specified—
Red HatRed Hat Directory Server 12Not specified—
Red HatRed Hat Directory Server 13Not specified—
Red HatRed Hat Enterprise Linux 6Not specified—

06 References

07 Fixed in

AlmaLinux 8

  • 389-ds-base
    Fixed in 1.4.3.39-28.module_el8.10.0+4274+00f9a3f1
  • 389-ds-base-devel
    Fixed in 1.4.3.39-28.module_el8.10.0+4274+00f9a3f1
  • 389-ds-base-legacy-tools
    Fixed in 1.4.3.39-28.module_el8.10.0+4274+00f9a3f1
  • 389-ds-base-libs
    Fixed in 1.4.3.39-28.module_el8.10.0+4274+00f9a3f1
  • 389-ds-base-snmp
    Fixed in 1.4.3.39-28.module_el8.10.0+4274+00f9a3f1
  • python3-lib389
    Fixed in 1.4.3.39-28.module_el8.10.0+4274+00f9a3f1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • 389-ds-base
    Fixed in 2.8.0-10.el9_8
  • 389-ds-base-devel
    Fixed in 2.8.0-10.el9_8
  • 389-ds-base-libs
    Fixed in 2.8.0-10.el9_8
  • 389-ds-base-snmp
    Fixed in 2.8.0-10.el9_8
  • python3-lib389
    Fixed in 2.8.0-10.el9_8

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 10

  • 389-ds-base
    Fixed in 3.2.0-10.el10_2
  • 389-ds-base-bdb
    Fixed in 3.2.0-10.el10_2
  • 389-ds-base-devel
    Fixed in 3.2.0-10.el10_2
  • 389-ds-base-libs
    Fixed in 3.2.0-10.el10_2
  • 389-ds-base-snmp
    Fixed in 3.2.0-10.el10_2
  • python3-lib389
    Fixed in 3.2.0-10.el10_2

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • 389-ds-base
    Fixed in 1.4.3.39-28.module_el8.10.0+4274+00f9a3f1
  • 389-ds-base-devel
    Fixed in 1.4.3.39-28.module_el8.10.0+4274+00f9a3f1
  • 389-ds-base-legacy-tools
    Fixed in 1.4.3.39-28.module_el8.10.0+4274+00f9a3f1
  • 389-ds-base-libs
    Fixed in 1.4.3.39-28.module_el8.10.0+4274+00f9a3f1
  • 389-ds-base-snmp
    Fixed in 1.4.3.39-28.module_el8.10.0+4274+00f9a3f1
  • python3-lib389
    Fixed in 1.4.3.39-28.module_el8.10.0+4274+00f9a3f1

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • 389-ds-base
    Fixed in 2.8.0-10.el9_8
  • 389-ds-base-devel
    Fixed in 2.8.0-10.el9_8
  • 389-ds-base-libs
    Fixed in 2.8.0-10.el9_8
  • 389-ds-base-snmp
    Fixed in 2.8.0-10.el9_8
  • python3-lib389
    Fixed in 2.8.0-10.el9_8

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 10

  • 389-ds-base
    Fixed in 3.2.0-10.el10_2
  • 389-ds-base-bdb
    Fixed in 3.2.0-10.el10_2
  • 389-ds-base-devel
    Fixed in 3.2.0-10.el10_2
  • 389-ds-base-libs
    Fixed in 3.2.0-10.el10_2
  • 389-ds-base-snmp
    Fixed in 3.2.0-10.el10_2
  • python3-lib389
    Fixed in 3.2.0-10.el10_2

Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • 389-ds-base
    No fix yet

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • 389-ds-base
    No fix yet

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • 389-ds-base
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • 389-ds-base
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.04 LTS

  • 389-ds-base
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.10

  • 389-ds-base
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • 389-ds-base
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • 389-ds-base
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 20.04 LTS

  • 389-ds-base
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.