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CVE-2026-14940

389-ds-base: 389-ds-base: heap-buffer-overflow in dn normalization via quoted multivalued rdn

Published: Jul 7, 2026Updated: Jul 9, 2026 Sources: CVE List NVDCWE-122
5.3MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 78.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

A heap-buffer-overflow flaw was found in 389 Directory Server (389-ds-base). When normalizing a Distinguished Name (DN) that contains a legacy-quoted value encoding a multivalued nested Relative Distinguished Name (RDN), the server can write past the end of a heap allocation while sorting RDN attribute-value pairs. An unauthenticated remote attacker can trigger this condition by sending an LDAP operation whose DN reaches the DN normalization routine, such as a search with a crafted base DN. This can corrupt heap memory and may cause denial of service.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-122

Affected Products

Red Hat
commercial·USaka redhat
directory serverOn-prem
Operating Systems / linux-distro
389 directory serverOn-prem
Operating Systems / linux-distro
Red Hat Enterprise Linux 10On-premOS
Operating Systems / linux-distro
Red Hat Directory Server 11On-premDatabase
Databases / relational
Red Hat Directory Server 12On-premDatabase
Databases / relational
Red Hat Directory Server 13On-premDatabase
Databases / relational
and 5 more affected products View all →

Exploitability

Official Patch Available
Workaround Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://access.redhat.com/security/cve/CVE-2026-14940
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2497697
bugzilla.redhat.com

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