🛡️ CVE-2026-14940 — 389-directory-server
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.
How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability low.
Weakness class
CVE-2026-14940 is classified as CWE-122: Heap-based Buffer Overflow. A write past the end of a heap allocation corrupts allocator metadata or neighbouring objects.
Affected software
CVE-2026-14940 is recorded against 3 packages.
- 389-directory-server
- directory-server
- enterprise-linux
Timeline and source
Published on 7 July 2026 and last revised on 9 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.
References
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| 389-directory-server | — | — |
| directory-server | — | — |
| enterprise-linux | — | — |
References
Similar Threats
- Medium CVE-2026-18651
- High CVE-2026-11770
- High CVE-2026-15722
- Low CVE-2026-15041
- Medium CVE-2026-14969
Vulnerability Monitoring
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