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389 Directory Server EUVDEUVD-2026-35417

| CVE-2026-11786 MEDIUM
Out-of-bounds Read (CWE-125)
2026-06-09 redhat GHSA-8969-43cc-8p5h
Buffer Overflow Information Disclosure Red Hat Enterprise Linux 10 Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 9 Red Hat Directory Server 11 Red Hat Directory Server 12 Red Hat Directory Server 13 Red Hat
6.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
SUSE
5.0 MEDIUM
AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:H
Red Hat
1.9 LOW
qualitative

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

3
Severity Changed
Jun 12, 2026 - 18:52 NVD
LOW MEDIUM
CVSS changed
Jun 12, 2026 - 18:52 NVD
1.9 (LOW) 6.5 (MEDIUM)
Analysis Generated
Jun 09, 2026 - 13:53 vuln.today

DescriptionNVD

A flaw was found in 389 Directory Server. The LDIF parser reads past the end of a heap buffer when processing attribute types with trailing semicolons during database import, causing an out-of-bounds read detectable under memory instrumentation.

AnalysisAI

Out-of-bounds read in 389 Directory Server's LDIF parser exposes limited heap memory to a highly privileged local attacker during database import operations. Exploitation requires local system access, high attack complexity, and high privileges (administrator-level), producing only minor confidentiality impact with no integrity or availability consequences. No public exploit identified at time of analysis and no KEV listing; the CVSS score of 1.9 reflects the extremely constrained exploitation conditions, making this a low operational priority absent specific threat model considerations.

Technical ContextAI

389 Directory Server is Red Hat's open-source LDAP server implementation, distributed as part of Red Hat Directory Server (versions 11, 12, 13) and as the 389-ds-base package bundled with Red Hat Enterprise Linux 6 through 10. LDIF (LDAP Data Interchange Format) is the standard text format for representing LDAP directory entries, used during bulk database import operations via tools such as 'db2ldif' or 'ldif2db'. The CWE-125 root cause (Out-of-Bounds Read) manifests in the attribute type tokenizer: when an attribute descriptor carries a trailing semicolon - a valid LDIF construct used to denote attribute options - the parser advances its read pointer past the allocated heap buffer boundary without a proper length check. The description explicitly notes this is 'detectable under memory instrumentation,' indicating the bug surfaces reliably under AddressSanitizer (ASAN) or Valgrind but may not produce observable, reliable reads in uninstrumented production deployments. CPE strings confirm impact across all major RHDS and RHEL variants currently in Red Hat's support lifecycle.

RemediationAI

No vendor-released patch version is independently confirmed from the available source data; monitor https://access.redhat.com/security/cve/CVE-2026-11786 and https://bugzilla.redhat.com/show_bug.cgi?id=2485426 for fix availability and errata releases. Given the exploitation conditions (AV:L/PR:H), the primary compensating control is restricting who can perform LDIF database import operations - specifically, limiting 'ldif2db' and related import tooling to a dedicated, audited service account and avoiding import of LDIF files from untrusted or unvalidated sources. Organizations running 389-ds-base under memory-instrumented builds (e.g., ASAN-enabled QA or compliance environments) may observe crashes on malformed LDIF; a workaround is to validate LDIF syntax with a linting tool before import. Since the impact is limited to read-only confidentiality with no integrity or availability effect, runtime mitigations such as SELinux confinement of the 'ns-slapd' process already present on RHEL systems provide meaningful defense-in-depth. No significant operational trade-off is introduced by existing RHEL SELinux policies.

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Same weakness CWE-125 – Out-of-bounds Read

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CVE-2017-5030 HIGH POC
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CVE-2016-4523 HIGH
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CVE-2024-48456 HIGH POC
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CVE-2024-48457 HIGH POC
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Same technique Buffer Overflow

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CVE-2015-5119 CRITICAL POC
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CVE-2020-0796 CRITICAL POC
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CVE-2019-11043 CRITICAL POC
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CVE-2009-0927 HIGH POC
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CVE-2012-1889 HIGH POC
8.8

Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected
SUSE Linux Enterprise Module for Server Applications 15 SP7 Affected
SUSE Linux Enterprise Server 15 SP7 Affected
SUSE Linux Enterprise Server 16.0 Affected
SUSE Linux Enterprise Server 16.1 Affected

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EUVD-2026-35417 vulnerability details – vuln.today
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