CVE record · CVE-2026-4408

Samba: remote code execution in samr

CVSS 9.0 CriticalCriticalEPSS 0.025 · 84th percentile

Critical, because:

CVSS score 9.0: 9.0 or more.

Published by the CVE Program (CNA: redhat) at 28 May 2026, 07:25 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Red Hat	Red Hat Enterprise Linux 10 Package name: samba https://access.redhat.com/downloads/content/package-browser/	unaffected 0:4.23.5-109.el10_2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 10.0 Extended Update Support Package name: samba https://access.redhat.com/downloads/content/package-browser/	unaffected 0:4.21.3-114.el10_0.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support Package name: samba https://access.redhat.com/downloads/content/package-browser/	unaffected 0:4.10.16-26.el7_9.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support Package name: samba https://access.redhat.com/downloads/content/package-browser/	unaffected 0:4.10.16-26.el7_9.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8 Package name: samba https://access.redhat.com/downloads/content/package-browser/	unaffected 0:4.19.4-16.el8_10 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8 Package name: samba https://access.redhat.com/downloads/content/package-browser/	unaffected 0:4.19.4-16.el8_10 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Package name: samba https://access.redhat.com/downloads/content/package-browser/	unaffected 0:4.13.3-12.el8_4.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Package name: samba https://access.redhat.com/downloads/content/package-browser/	unaffected 0:4.13.3-12.el8_4.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Package name: samba https://access.redhat.com/downloads/content/package-browser/	unaffected 0:4.15.5-16.el8_6.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Package name: samba https://access.redhat.com/downloads/content/package-browser/	unaffected 0:4.15.5-16.el8_6.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service Package name: samba https://access.redhat.com/downloads/content/package-browser/	unaffected 0:4.17.5-7.el8_8.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Package name: samba https://access.redhat.com/downloads/content/package-browser/	unaffected 0:4.17.5-7.el8_8.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9 Package name: samba https://access.redhat.com/downloads/content/package-browser/	unaffected 0:4.23.5-10.el9_8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9 Package name: samba https://access.redhat.com/downloads/content/package-browser/	unaffected 0:4.23.5-10.el9_8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Package name: samba https://access.redhat.com/downloads/content/package-browser/	unaffected 0:4.17.5-105.el9_2.5 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Package name: samba https://access.redhat.com/downloads/content/package-browser/	unaffected 0:4.19.4-105.el9_4.4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support Package name: samba https://access.redhat.com/downloads/content/package-browser/	unaffected 0:4.21.3-14.el9_6.1 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.12 Package name: openshift/ose-rhel-coreos-8 https://access.redhat.com/downloads/content/package-browser/	unaffected 412.86.202608241157-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.13 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 413.92.202609080414-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.14 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 414.92.202608172040-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.15 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 415.92.202608180329-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.16 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 416.94.202608150307-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.17 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 417.94.202608250221-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.18 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 418.94.202608142238-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.19 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 4.19.9.6.202606241344-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.20 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 4.20.9.6.202606241928-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.21 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 4.21.9.6.202606241859-0 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 6 Package name: samba https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: unknown
Red Hat	Red Hat Enterprise Linux 6 Package name: samba4 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: unknown

Identifiers: CVE-2026-4408
CNA: redhat
Weakness (CWE): CWE-78
Tags: Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 10.0 Extended Update Support
Red Hat Enterprise Linux 7 Extended Lifecycle Support
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
Command injection
Published: 28 May 2026
Updated: 4 Nov 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
9.0	Critical	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H	CNA (redhat)Used for this record
9.0	Critical	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H	ADP (redhat-SADP)

CISA KEV Not listed.
EPSS 0.025, the 84th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

28 May 2026, 07:25 UTC Confirmed by the CVE List
28 May 2026, 09:16 UTC Confirmed by NVD

Sources

References from the CNA

access.redhat.com/errata/RHSA-2026:22644 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:22963 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:25049 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:25979 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:28053 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:28054 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:28055 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:28056 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:28057 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:28058 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:28132 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:29799 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:29833 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:29863 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:56786 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:56853 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:56911 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:57483 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:59831 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:60019 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:65839 vendor-advisoryredhat
access.redhat.com/security/cve/CVE-2026-4408 vdb-entryredhat
bugzilla.redhat.com/show_bug.cgi?id=2479762 issue-trackingredhat
bugzilla.samba.org/show_bug.cgi?id=16034

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.