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CVE-2026-14940

MEDIUM
5.3
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-14940
State
PUBLISHED
Assigner
redhat
Reserved
2026-07-07 12:01 UTC
Published
2026-07-07 13:54 UTC
Last updated
2026-07-07 15:35 UTC
Primary CWE
CWE-122
Heap-based Buffer Overflow
Vendor / Product
Red Hat / Red Hat Directory Server 11
Sources
cve.org  ·  NVD

Severity & Metrics

5.3 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
partial
Affected products (8)
VendorProductPlatformVersions
Red Hat 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 Red Hat Enterprise Linux 7 — —
Red Hat Red Hat Enterprise Linux 8 — —
Red Hat Red Hat Enterprise Linux 9 — —
Weakness (CWE)
CWESourceDescription
CWE-122 cna Heap-based Buffer Overflow
CVSS scores (1)
ScoreSeverityVersionSourceVector
5.3 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
References (2)
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