CVE-2026-14940
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 to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| redhat directory_server | 11.0, 12.0, 13.0 | — |
| redhat 389_directory_server | No range specified | — |
| redhat enterprise_linux | 7.0, 8.0, 9.0, 10.0 | — |
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