CVE-2026-14940 (GCVE-0-2026-14940)

Vulnerability from cvelistv5 – Published: 2026-07-07 13:54 – Updated: 2026-07-07 15:35
VLAI
Title
389-ds-base: 389-ds-base: heap-buffer-overflow in dn normalization via quoted multivalued rdn
Summary
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.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-14940 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2497697 issue-trackingx_refsource_REDHAT
Impacted products
Date Public
2026-07-07 12:01
Credits
Red Hat would like to thank Denis Rastyogin (ALT Linux) for reporting this issue.
Show details on NVD website
To clipboard 

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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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