CVE-2026-14940
MEDIUM389-ds-base: 389-ds-base: heap-buffer-overflow in dn normalization via quoted multivalued rdn
Title source: cnaDescription
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.
References (2)
Core 2
Core References
Vdb Entry, X_Refsource_Redhat vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-14940
Issue Tracking, X_Refsource_Redhat issue-tracking
x_refsource_redhat
RHBZ#2497697
https://bugzilla.redhat.com/show_bug.cgi?id=2497697
Scores
CVSS v3
5.3
EPSS
0.0031
EPSS Percentile
22.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-122
Status
published
Products (8)
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
Published
Jul 07, 2026
Tracked Since
Jul 07, 2026