CVE-2023-32256
Full vulnerability record from the local CVENow database.
Description
A flaw was found in the Linux kernel's ksmbd component. A race condition between smb2 close operation and logoff in multichannel connections could result in a use-after-free issue.
Severity
HIGH
CVSS score
7.5
(v3.1)
Vulnerability status
Deferred
Source identifier
Published
2025-08-01 18:15:27.910000
Last modified
2026-11-06 21:17:00.240000
View original CVE JSON
{
"id": "CVE-2023-32256",
"sourceIdentifier": "[email protected]",
"published": "2025-08-01T18:15:27.910",
"lastModified": "2026-11-06T21:17:00.240",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in the Linux kernel's ksmbd component. A race condition between smb2 close operation and logoff in multichannel connections could result in a use-after-free issue."
},
{
"lang": "es",
"value": "Se detectó una falla en el componente ksmbd del kernel de Linux. Una condición de ejecución entre la operación de cierre de smb2 y el cierre de sesión en conexiones multicanal podría provocar un problema de use-after-free."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"defaultStatus": "unaffected",
"collectionURL": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/",
"packageName": "linux",
"versions": [
{
"version": "0",
"lessThan": "5.15.145",
"versionType": "semvar",
"status": "affected"
},
{
"version": "6.0.0",
"lessThan": "6.0.*",
"versionType": "semvar",
"status": "affected"
},
{
"version": "6.1.0",
"lessThan": "6.1.29",
"versionType": "semvar",
"status": "affected"
},
{
"version": "6.2.0",
"lessThan": "6.2.16",
"versionType": "semvar",
"status": "affected"
},
{
"version": "6.3.0",
"lessThan": "6.3.2",
"versionType": "semvar",
"status": "affected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 10",
"defaultStatus": "unaffected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "kernel",
"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": "kernel",
"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": "kernel",
"cpes": [
"cpe:/o:redhat:rhel_els:7"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 7",
"defaultStatus": "unaffected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "kernel-rt",
"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": "kernel",
"cpes": [
"cpe:/a:redhat:enterprise_linux:8"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8",
"defaultStatus": "unaffected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "kernel-rt",
"cpes": [
"cpe:/a:redhat:enterprise_linux:8"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9",
"defaultStatus": "unaffected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "kernel",
"cpes": [
"cpe:/a:redhat:enterprise_linux:9"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9",
"defaultStatus": "unaffected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "kernel-rt",
"cpes": [
"cpe:/a:redhat:enterprise_linux:9"
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:H",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "CHANGED",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 2.2,
"impactScore": 4.7
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2025-08-01T19:19:19.939025Z",
"id": "CVE-2023-32256",
"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-421"
}
]
}
],
"references": [
{
"url": "https://access.redhat.com/security/cve/CVE-2023-32256",
"source": "[email protected]"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2385885",
"source": "[email protected]"
},
{
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=abcc506a9a71976a8b4c9bf3ee6efd13229c1e19",
"source": "[email protected]"
},
{
"url": "https://www.zerodayinitiative.com/advisories/ZDI-23-704/",
"source": "[email protected]"
}
]
}