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CVE-2026-11884

389-ds-base: 389-ds-base: heap buffer overflow in schema objectclass serialization due to missing oc_superior in size calculation

Published: Jun 10, 2026Updated: Jun 10, 2026 Sources: CVE List NVD
NVD MITRE
6.5CVSS
MEDIUM

A heap buffer overflow flaw was found in 389 Directory Server. When serializing objectclass definitions, the oc_superior (SUP) field length is omitted from buffer size calculations in read_schema_dse() and schema_oc_to_string(), but the field is still written via strcat(). An attacker with Directory Manager privileges, or a compromised replication supplier, can trigger a server crash by creating objectclasses with long SUP values. This is an incomplete fix variant of CVE-2025-14905.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only

CVSS Vector Breakdown

AV:NAC:LPR:HUI:NS:UC:NI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:HAvailability
High

Weaknesses

CWE-122

Affected Products

Red Hat Directory Server 11
Red Hat
Red Hat Directory Server 12
Red Hat
Red Hat Directory Server 13
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 6
Red Hat
and 3 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Workaround Available

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://access.redhat.com/security/cve/CVE-2026-11884
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2423624
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2484913
bugzilla.redhat.com
and 1 more references View all →

Timeline

Published
Jun 10, 2026
Last Updated
Jun 10, 2026

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