RCE in Red Hat Enterprise Linux 10
CVE-2026-4408
A flaw was found in Samba. A remote attacker can exploit a misconfiguration in Samba file servers and classic domain controllers that use the "check password script" feature. If this script is configured with the %u substitution character…
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.004 (60.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Red Hat Enterprise Linux 10 — versions 0:4.23.5-109.el10_2
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8 — versions 0:4.19.4-16.el8_10
- Red Hat Enterprise Linux 9
- Red Hat Openshift Container Platform 4
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
- secalert@redhat.com
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
Frequently asked questions
- What is CVE-2026-4408?
- CVE-2026-4408 is a critical-severity vulnerability in Red Hat Enterprise Linux 10, classified under OS Command Injection. CVSS score: 9.0/10. Published 2026-05-28.
- How severe is CVE-2026-4408?
- Critical severity. CVSS v3 base score is 9.0 out of 10.