6.5

CVE-2026-11789: redhat 389_directory_server Integer Underflow (Wrap or Wraparound)

CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-11789DEBIAN-CVE-2026-11789
Published 09-06-2026Last modified 30-06-2026
Open JSON

Vulnerability summary

CVE-2026-11789 is a medium (CVSS 6.5) Integer Underflow (Wrap or Wraparound) vulnerability in redhat 389_directory_server. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 19.4% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.28%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 6
OPENSUSE-SU-2026:11600-1OPENSUSE-SU-2026:21691-1SUSE-SU-2026:23574-1SUSE-SU-2026:3136-1SUSE-SU-2026:3137-1SUSE-SU-2026:3138-1

Timeline

  1. 09-06-2026
    PublishedVulnerability first disclosed.
  2. 30-06-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.28%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

0.00 pp

From 0.28% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.28%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Redhat3 products
Debian1 product
  • 389-ds-baseAll versions (No fix recorded)
Ubuntu1 product
  • 389-ds-baseAll versions (No fix recorded)

3 vendors · 5 products

References

6 links