CVE-2025-14905

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

publishedCWE-122

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).

Technical severity7.2 highCVSS 3.1 · CNA: redhat

Published2026-02-23Source updated 2026-11-05

Collected2026-11-052 attributed sources

Fixes and workarounds

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

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
Red Hat Directory Server 11.5 E4S for RHEL 8 Red Hat `redhat-ds:11` https://access.redhat.com/downloads/content/package-browser/	≥ 8060020260303152239.0ca98e7e; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Directory Server 11.7 E4S for RHEL 8 Red Hat `redhat-ds:11` https://access.redhat.com/downloads/content/package-browser/	≥ 8080020260227193008.f969626e; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Directory Server 11.9 for RHEL 8 Red Hat `redhat-ds:11` https://access.redhat.com/downloads/content/package-browser/	≥ 8100020260312105752.37ed7c03; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Directory Server 12.2 E4S for RHEL 9 Red Hat `redhat-ds:12` https://access.redhat.com/downloads/content/package-browser/	≥ 9020020260304180546.1674d574; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Directory Server 12.4 EUS for RHEL 9 Red Hat `redhat-ds:12` https://access.redhat.com/downloads/content/package-browser/	≥ 9040020260225135630.1674d574; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 10 Red Hat `389-ds-base` https://access.redhat.com/downloads/content/package-browser/	≥ 0:3.1.3-7.el10_1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 10.0 Extended Update Support Red Hat `389-ds-base` https://access.redhat.com/downloads/content/package-browser/	≥ 0:3.0.6-17.el10_0; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 7 Extended Lifecycle Support Red Hat `389-ds-base` https://access.redhat.com/downloads/content/package-browser/	≥ 0:1.3.11.1-11.el7_9; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8 Red Hat `389-ds:1.4` https://access.redhat.com/downloads/content/package-browser/	≥ 8100020260312103235.25e700aa; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.2 Advanced Update Support Red Hat `389-ds:1.4` https://access.redhat.com/downloads/content/package-browser/	≥ 8020020260303204738.dbc46ba7; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat `389-ds:1.4` https://access.redhat.com/downloads/content/package-browser/	≥ 8040020260303172348.96015a92; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Red Hat `389-ds:1.4` https://access.redhat.com/downloads/content/package-browser/	≥ 8040020260303172348.96015a92; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat `389-ds:1.4` https://access.redhat.com/downloads/content/package-browser/	≥ 8060020260303144613.824efc52; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.6 Telecommunications Update Service Red Hat `389-ds:1.4` https://access.redhat.com/downloads/content/package-browser/	≥ 8060020260303144613.824efc52; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Red Hat `389-ds:1.4` https://access.redhat.com/downloads/content/package-browser/	≥ 8060020260303144613.824efc52; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.8 Telecommunications Update Service Red Hat `389-ds:1.4` https://access.redhat.com/downloads/content/package-browser/	≥ 8080020260227183930.6dbb3803; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat `389-ds:1.4` https://access.redhat.com/downloads/content/package-browser/	≥ 8080020260227183930.6dbb3803; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9 Red Hat `389-ds-base` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.7.0-10.el9_7; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Red Hat `389-ds-base` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.0.14-5.el9_0; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Red Hat `389-ds-base` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.2.4-17.el9_2; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9.4 Extended Update Support Red Hat `389-ds-base` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.4.5-24.el9_4; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9.6 Extended Update Support Red Hat `389-ds-base` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.6.1-20.el9_6; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Directory Server 13.1 Red Hat `dirsrv/dirsrv-container-rhel10` https://catalog.redhat.com/software/containers/	≥ 1772040913; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Directory Server 12 Red Hat `redhat-ds:12/389-ds-base` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat Directory Server 13 Red Hat `389-ds-base` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 6 Red Hat `389-ds-base` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 7.2 high	`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`	CNA: redhat

Exploit evidence

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

References

https://access.redhat.com/errata/RHSA-2026:3189CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:3208CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:3379CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:3504CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:4207CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:4661CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:4720CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:5196CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:5511CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:5512CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:5513CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:5514CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:5568CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:5569CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:5576CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:5597CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:5598CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6220CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6268CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2025-14905CNA: redhat · vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2423624CNA: redhat · issue-tracking, x_refsource_REDHAT

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