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Description

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.

PUBLISHED Reserved 2026-06-10 | Published 2026-06-10 | Updated 2026-06-10 | Assigner redhat




MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

Problem types

Heap-based Buffer Overflow

Product status

Default status
affected

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affected

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affected

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affected

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unknown

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affected

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affected

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affected

Timeline

2026-04-16:Reported to Red Hat.
2026-06-04:Made public.

References

access.redhat.com/security/cve/CVE-2026-11884 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2423624

bugzilla.redhat.com/show_bug.cgi?id=2484913 (RHBZ#2484913) issue-tracking

redhat.atlassian.net/browse/PSIRTSUPT-7600

cve.org (CVE-2026-11884)

nvd.nist.gov (CVE-2026-11884)

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