CVE-2026-74467 (GCVE-0-2026-74467)
Vulnerability from cvelistv5
Published
2026-08-15 12:27
Modified
2026-08-19 16:37
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
s390/qeth: Check CAP_NET_ADMIN for private ioctls
Gate the SIOCDEVPRIVATE ioctl commands SIOC_QETH_ADP_SET_SNMP_CONTROL,
SIOC_QETH_GET_CARD_TYPE and SIOC_QETH_QUERY_OAT with CAP_NET_ADMIN
capable check to ensure unprivileged users cannot invoke them.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 18787eeebd7129ecf4960876d24f349682207783 Version: 18787eeebd7129ecf4960876d24f349682207783 Version: 18787eeebd7129ecf4960876d24f349682207783 Version: 18787eeebd7129ecf4960876d24f349682207783 Version: 18787eeebd7129ecf4960876d24f349682207783 Version: 18787eeebd7129ecf4960876d24f349682207783 Version: 18787eeebd7129ecf4960876d24f349682207783 |
||
{
"containers": {
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"product": "Linux",
"programFiles": [
"drivers/s390/net/qeth_core_main.c"
],
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{
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],
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"vendor": "Linux",
"versions": [
{
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"version": "5.15"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "5.15.216",
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},
{
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"status": "unaffected",
"version": "6.1.183",
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},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.151",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.103",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.44",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.216",
"versionStartIncluding": "5.15",
"vulnerable": true
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{
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/qeth: Check CAP_NET_ADMIN for private ioctls\n\nGate the SIOCDEVPRIVATE ioctl commands SIOC_QETH_ADP_SET_SNMP_CONTROL,\nSIOC_QETH_GET_CARD_TYPE and SIOC_QETH_QUERY_OAT with CAP_NET_ADMIN\ncapable check to ensure unprivileged users cannot invoke them."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - Exploitation requires a local ioctl(2) on a qeth network interface via socket(SIOCDEVPRIVATE+5..+7); the path is sock_ioctl() -\u003e dev_ioctl() -\u003e dev_siocdevprivate() -\u003e qeth_siocdevprivate() with no remote packet or network protocol entry point.\nAC:L - Any local user who can open an AF_INET socket and name a qeth netdev can invoke these ioctls deterministically; no races, special memory layout, or rare kernel configuration is required beyond s390 hardware with qeth present.\nPR:L - The bug is missing CAP_NET_ADMIN in qeth_siocdevprivate(); generic SIOCDEVPRIVATE handling in dev_ioctl() performs no capability check, so any unprivileged local account on an IBM Z/LinuxONE LPAR can reach these handlers without root or namespace-granted admin rights.\nUI:N - Exploitation needs only the attacker opening a socket and issuing ioctl against a qeth interface; no victim login, mount, or other interactive action is required on a shared mainframe guest.\nS:U - Impact stays within kernel/driver control of the local OSA/QDIO adapter and does not cross a VM, container, or IOMMU security boundary; this is standard local privilege and hardware-management misuse, not a guest-to-host escape.\nC:H - SIOC_QETH_QUERY_OAT and SIOC_QETH_ADP_SET_SNMP_CONTROL copy OSA Express firmware response buffers (link attributes, adapter operational data, SNMP MIB objects, card-type details) to unprivileged userspace, disclosing network hardware management information normally restricted to administrators.\nI:H - SIOC_QETH_ADP_SET_SNMP_CONTROL accepts attacker-controlled qeth_snmp_cmd request/data and forwards IPA_SETADP_SET_SNMP_CONTROL commands to OSA firmware, letting unprivileged users alter adapter SNMP/management state on production IBM Z network interfaces.\nA:H - Handlers honor attacker-chosen buffer sizes (kzalloc(udata_len) in qeth_snmp_command and vzalloc(buffer_len) in qeth_query_oat_command without upper bounds), enabling repeated large allocations for kernel memory exhaustion/OOM, and malformed IPA commands can disrupt adapter operation."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:37:10.278Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/8fb69547924bbb3d7c900a0d7d137a7234db3f5f"
},
{
"url": "https://git.kernel.org/stable/c/3ea5210db058347481c93849786982f874f7be2d"
},
{
"url": "https://git.kernel.org/stable/c/4e48168825818bf4a13c743582227d15f1d30d04"
},
{
"url": "https://git.kernel.org/stable/c/b40c74262f7e1e601221cebccdbdb2b392ff9976"
},
{
"url": "https://git.kernel.org/stable/c/bd63c7879eaa87f1958f7ee027813356fcd9ff11"
},
{
"url": "https://git.kernel.org/stable/c/93a0a846ec59a88e0c402878a15357a5ce430eb4"
},
{
"url": "https://git.kernel.org/stable/c/d211028bac1bd0fff0026bfa2a8328e5b78cd0e6"
}
],
"title": "s390/qeth: Check CAP_NET_ADMIN for private ioctls",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-74467",
"datePublished": "2026-08-15T12:27:05.635Z",
"dateReserved": "2026-08-15T05:44:03.902Z",
"dateUpdated": "2026-08-19T16:37:10.278Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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