Red HatCVE-2026-14940
Red Hat Directory Server 11: denial of service
Medium5.3CVE-2026-14940 · Published Jul 7, 2026 · updated Jul 9, 2026
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Directory Server 11 Product | all versions | No fix yet |
| Red Hat Directory Server 12 Product | all versions | No fix yet |
| Red Hat Directory Server 13 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 10 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 6 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 7 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 8 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 9 Product | all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-122
More Red Hat advisories
All Red Hat| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Jul 7 | Red Hat Jastow: cross-site scripting | Medium6.5 | No fix yet |
| Jul 7 | Red Hat GStreamer: incorrect control flow | Low3.7 | No fix yet |
| Jul 7 | Red Hat 389-ds-base: attacker could detect plaintext equality across encrypted | Medium4.4 | No fix yet |
| Jul 7 | Red Hat 389-ds-base: buffer overflow | High8.8 | No fix yet |
| Jul 7 | Red Hat SSSD: insecure default | High8.8 | No fix yet |
| Jul 7 | Red Hat SSSD: path traversal | High8.0 | No fix yet |