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Advisory severityMedium4.3Red Hat Linux

Medium [CVE-2026-11785] 389-ds-base: 389-ds-base: partial stack address information leak via ber_printf type confusion in sso token handler

This medium-severity Red Hat Linux advisory covers CVE-2026-11785 affecting Red Hat Directory Server 12, Red Hat Directory Server 13, Red Hat Enterprise Linux 10.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-11785 Source published Source updated

VulniPulse record published

CVE-2026-11785
Affected products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

Summary

A flaw was found in 389 Directory Server. A type confusion in the SSO token extended operation handler causes partial stack address information to be disclosed in LDAP responses to authenticated users.

The SSO token feature, which is enabled by default in Red Hat Directory Server, leaks the lower 32 bits of a stack address in LDAP extended operation responses, reducing Address Space Layout Randomization (ASLR) entropy but not leading to a full bypass. Red Hat severity: Moderate — CVSS 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N).

Weakness: CWE-843. Affected Red Hat products: Red Hat Directory Server 12; Red Hat Directory Server 13; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9.

Red Hat does not currently list a fixing RHSA for this CVE.

Affected products named by the advisory: Red Hat package: 389-ds-base.

Is CVE-2026-11785 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-11785 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-11785?

The advisory VulniPulse tracks names no fixed release. Follow Red Hat's guidance for workarounds and updates.

Confirm against the vendor advisory before you patch.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · high-confidence parse· fetched 4 days ago·verify at source

Fixed versions

No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.

Official advisory · high-confidence parse· fetched 4 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Option 1 (Recommended): Disable the SSO token feature entirely: dsconf <instance> config replace nsslapd-enable-ldapssotoken=off. This prevents the vulnerable code path from being reached but disables SSO token functionality for all users. Option 2: Restrict network access to LDAP ports (389/636) to trusted networks via firewall rules. Note: Removing the SSO token secret from configuration does not mitigate the vulnerability — the server auto-generates a new secret at startup.

Official advisory · high-confidence parse· fetched 4 days ago·verify at source

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