CVE-2025-0620
Full vulnerability record from the local CVENow database.
Description
A flaw was found in Samba. The smbd service daemon does not pick up group membership changes when re-authenticating an expired SMB session. This issue can expose file shares until clients disconnect and then connect again.
Severity
MEDIUM
CVSS score
4.9
(v3.1)
Vulnerability status
Modified
Source identifier
Published
2025-06-06 14:15:21.247000
Last modified
2026-11-05 15:17:06.207000
View original CVE JSON
{
"id": "CVE-2025-0620",
"sourceIdentifier": "[email protected]",
"published": "2025-06-06T14:15:21.247",
"lastModified": "2026-11-05T15:17:06.207",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in Samba. The smbd service daemon does not pick up group membership changes when re-authenticating an expired SMB session. This issue can expose file shares until clients disconnect and then connect again."
},
{
"lang": "es",
"value": "Se detectó una falla en Samba. El demonio de servicio smbd no detecta los cambios en la membresía de grupo al volver a autenticar una sesión SMB expirada. Este problema puede exponer los recursos compartidos de archivos hasta que los clientes se desconecten y se vuelvan a conectar."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"defaultStatus": "unaffected",
"collectionURL": "https://www.samba.org/",
"packageName": "samba",
"versions": [
{
"version": "4.21.0",
"lessThan": "4.21.6",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 10",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "samba",
"cpes": [
"cpe:/a:redhat:enterprise_linux:10"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 6",
"defaultStatus": "unaffected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "samba",
"cpes": [
"cpe:/o:redhat:rhel_els:6"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 6",
"defaultStatus": "unaffected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "samba4",
"cpes": [
"cpe:/o:redhat:rhel_els:6"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 7",
"defaultStatus": "unaffected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "samba",
"cpes": [
"cpe:/o:redhat:rhel_els:7"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8",
"defaultStatus": "unaffected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "samba",
"cpes": [
"cpe:/a:redhat:enterprise_linux:8"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "samba",
"cpes": [
"cpe:/a:redhat:enterprise_linux:9"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 4",
"defaultStatus": "unaffected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "openshift/ose-rhel-coreos-8",
"cpes": [
"cpe:/a:redhat:openshift:4"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 4",
"defaultStatus": "unaffected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "openshift/ose-rhel-coreos-9",
"cpes": [
"cpe:/a:redhat:openshift:4"
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
"baseScore": 4.9,
"baseSeverity": "MEDIUM",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "HIGH",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"availabilityImpact": "NONE"
},
"exploitabilityScore": 1.2,
"impactScore": 3.6
},
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
"baseScore": 4.9,
"baseSeverity": "MEDIUM",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "HIGH",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"availabilityImpact": "NONE"
},
"exploitabilityScore": 1.2,
"impactScore": 3.6
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-03-18T20:43:04.010677Z",
"id": "CVE-2025-0620",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-552"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.21.0",
"versionEndExcluding": "4.21.6",
"matchCriteriaId": "BB495488-6E37-4519-8170-B8E160958149"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.22.0",
"versionEndExcluding": "4.22.2",
"matchCriteriaId": "69D6B3DB-4911-4E72-B3DE-D9443E5765B5"
}
]
}
]
}
],
"references": [
{
"url": "https://access.redhat.com/security/cve/CVE-2025-0620",
"source": "[email protected]",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2370453",
"source": "[email protected]",
"tags": [
"Issue Tracking",
"Third Party Advisory"
]
},
{
"url": "https://www.samba.org/samba/security/CVE-2025-0620.html",
"source": "[email protected]",
"tags": [
"Vendor Advisory"
]
},
{
"url": "http://www.openwall.com/lists/oss-security/2025/06/03/8",
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
]
}
]
}