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Vulnerability · Published Jun 9, 2026 · Assigned by redhat

CVE-2026-11789389-ds-base: 389-ds-base: smd5 password storage plugin salt length integer underflow crash

Medium 4.9

In plain English

A medium-severity security flaw in Red Hat Directory Server 11 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).

Severity (CVSS 3.1)4.9Medium
Exploit odds (30 days)0.3%top 79.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in 389 Directory Server. The SMD5 password storage plugin performs unsigned integer underflow when computing salt length from a crafted password hash shorter than 16 bytes, causing a buffer over-read that crashes the LDAP server during authentication.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12389-ds-baseno fix listedDEBIAN-CVE-2026-11789
Debian:13389-ds-baseno fix listedDEBIAN-CVE-2026-11789
Ubuntu:22.04:LTS389-ds-baseno fix listedUBUNTU-CVE-2026-11789
Ubuntu:24.04:LTS389-ds-baseno fix listedUBUNTU-CVE-2026-11789
Ubuntu:25.10389-ds-baseno fix listedUBUNTU-CVE-2026-11789
Ubuntu:26.04:LTS389-ds-baseno fix listedUBUNTU-CVE-2026-11789
Ubuntu:26.10389-ds-baseno fix listedUBUNTU-CVE-2026-11789

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Directory Server 11 see references
Red Hat Red Hat Directory Server 12 see references
Red Hat Red Hat Directory Server 13 see references
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 6 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references

Weakness: CWE-191 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

References