# CVE-2025-14905: 389-ds-base: 389-ds-base: remote code execution and denial of service via heap buffer overflow

Status: published. Published: 2026-02-23. Updated: 2026-11-05.

A flaw was found in the 389-ds-base server. A heap buffer overflow vulnerability exists in the `schema_attr_enum_callback` function within the `schema.c` file. This occurs because the code incorrectly calculates the buffer size by summing alias string lengths without accounting for additional formatting characters. When a large number of aliases are processed, this oversight can lead to a heap overflow, potentially allowing a remote attacker to cause a Denial of Service (DoS) or achieve Remote Code Execution (RCE).

## Remediation

- workaround: Restrict network access to the 389-ds-base server to only trusted hosts and networks using firewall rules. Additionally, ensure that administrative access to the server is strictly limited to authorized personnel with strong authentication, as exploitation requires high privileges. This reduces the attack surface and the likelihood of an attacker gaining the necessary privileges to trigger the heap overflow. (source: CNA: redhat)

## Affected products and versions

- Red Hat / Red Hat Directory Server 11.5 E4S for RHEL 8 (redhat-ds:11): ≥ 8060020260303152239.0ca98e7e; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Directory Server 11.7 E4S for RHEL 8 (redhat-ds:11): ≥ 8080020260227193008.f969626e; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Directory Server 11.9 for RHEL 8 (redhat-ds:11): ≥ 8100020260312105752.37ed7c03; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Directory Server 12.2 E4S for RHEL 9 (redhat-ds:12): ≥ 9020020260304180546.1674d574; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Directory Server 12.4 EUS for RHEL 9 (redhat-ds:12): ≥ 9040020260225135630.1674d574; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (389-ds-base): ≥ 0:3.1.3-7.el10_1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10.0 Extended Update Support (389-ds-base): ≥ 0:3.0.6-17.el10_0; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 Extended Lifecycle Support (389-ds-base): ≥ 0:1.3.11.1-11.el7_9; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (389-ds:1.4): ≥ 8100020260312103235.25e700aa; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.2 Advanced Update Support (389-ds:1.4): ≥ 8020020260303204738.dbc46ba7; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support (389-ds:1.4): ≥ 8040020260303172348.96015a92; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On (389-ds:1.4): ≥ 8040020260303172348.96015a92; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support (389-ds:1.4): ≥ 8060020260303144613.824efc52; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Telecommunications Update Service (389-ds:1.4): ≥ 8060020260303144613.824efc52; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions (389-ds:1.4): ≥ 8060020260303144613.824efc52; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.8 Telecommunications Update Service (389-ds:1.4): ≥ 8080020260227183930.6dbb3803; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions (389-ds:1.4): ≥ 8080020260227183930.6dbb3803; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (389-ds-base): ≥ 0:2.7.0-10.el9_7; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions (389-ds-base): ≥ 0:2.0.14-5.el9_0; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions (389-ds-base): ≥ 0:2.2.4-17.el9_2; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9.4 Extended Update Support (389-ds-base): ≥ 0:2.4.5-24.el9_4; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9.6 Extended Update Support (389-ds-base): ≥ 0:2.6.1-20.el9_6; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Directory Server 13.1 (dirsrv/dirsrv-container-rhel10): ≥ 1772040913; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Directory Server 12 (redhat-ds:12/389-ds-base): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Directory Server 13 (389-ds-base): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 6 (389-ds-base): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 7.2 (high); CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 1.29% as of 2026-11-05; percentile 70.37%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-122

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/errata/RHSA-2026:3189 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:3208 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:3379 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:3504 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:4207 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:4661 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:4720 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:5196 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:5511 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:5512 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:5513 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:5514 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:5568 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:5569 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:5576 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:5597 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:5598 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:6220 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:6268 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2025-14905 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2423624 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2025-14905; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2025-14905; retrieved 2026-11-05; source updated Not reported

Revision: 7e2cd36d5067320e4d23d9e23138a382912b2c6491f8b1c1cd1650bc1d32868a

Canonical: https://y2.dev/cve/CVE-2025-14905

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