On a system exposing an NVMe/TCP target, a remote client can trigger a kernel panic by sending a CONNECT command for an I/O queue with a bogus or stale CNTLID.
An attacker with network access to the NVMe/TCP target can trigger an unauthenticated Denial of Service condition on the affected machine.
< p5 - AFFECTED
{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-4652",
"assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
"assignerShortName": "freebsd",
"dateUpdated": "2026-03-26T13:31:31.356Z",
"dateReserved": "2026-03-23T14:35:04.472Z",
"datePublished": "2026-03-26T06:15:00.850Z",
"state": "PUBLISHED"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
"shortName": "freebsd",
"dateUpdated": "2026-03-26T06:15:00.850Z"
},
"datePublic": "2026-03-26T05:00:00.000Z",
"title": "Remote denial of service via null pointer dereference",
"descriptions": [
{
"lang": "en",
"value": "On a system exposing an NVMe/TCP target, a remote client can trigger a kernel panic by sending a CONNECT command for an I/O queue with a bogus or stale CNTLID.\n\nAn attacker with network access to the NVMe/TCP target can trigger an unauthenticated Denial of Service condition on the affected machine."
}
],
"affected": [
{
"vendor": "FreeBSD",
"product": "FreeBSD",
"modules": [
"nvmf"
],
"defaultStatus": "unknown",
"versions": [
{
"version": "15.0-RELEASE",
"status": "affected",
"versionType": "release",
"lessThan": "p5"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"description": "CWE-476: NULL Pointer Dereference",
"cweId": "CWE-476",
"type": "CWE"
}
]
}
],
"references": [
{
"url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:07.nvmf.asc",
"tags": [
"vendor-advisory"
]
}
],
"credits": [
{
"lang": "en",
"value": "Nikolay Denev <ndenev@gmail.com>",
"type": "finder"
}
]
},
"adp": [
{
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-03-26T13:31:31.356Z"
},
"title": "CISA ADP Vulnrichment",
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH"
}
},
{}
]
}
]
}
}