{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-74467", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.902Z", "datePublished": "2026-08-15T12:27:05.635Z", "dateUpdated": "2026-08-19T16:37:10.278Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:37:10.278Z" }, "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": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "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() -> dev_ioctl() -> dev_siocdevprivate() -> 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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/s390/net/qeth_core_main.c" ], "versions": [ { "version": "18787eeebd7129ecf4960876d24f349682207783", "lessThan": "8fb69547924bbb3d7c900a0d7d137a7234db3f5f", "status": "affected", "versionType": "git" }, { "version": "18787eeebd7129ecf4960876d24f349682207783", "lessThan": "3ea5210db058347481c93849786982f874f7be2d", "status": "affected", "versionType": "git" }, { "version": "18787eeebd7129ecf4960876d24f349682207783", "lessThan": "4e48168825818bf4a13c743582227d15f1d30d04", "status": "affected", "versionType": "git" }, { "version": "18787eeebd7129ecf4960876d24f349682207783", "lessThan": "b40c74262f7e1e601221cebccdbdb2b392ff9976", "status": "affected", "versionType": "git" }, { "version": "18787eeebd7129ecf4960876d24f349682207783", "lessThan": "bd63c7879eaa87f1958f7ee027813356fcd9ff11", "status": "affected", "versionType": "git" }, { "version": "18787eeebd7129ecf4960876d24f349682207783", "lessThan": "93a0a846ec59a88e0c402878a15357a5ce430eb4", "status": "affected", "versionType": "git" }, { "version": "18787eeebd7129ecf4960876d24f349682207783", "lessThan": "d211028bac1bd0fff0026bfa2a8328e5b78cd0e6", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/s390/net/qeth_core_main.c" ], "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.151", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.103", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.44", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.8", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "5.15.216" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.183" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.151" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.103" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.18.44" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.1.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.2" } ] } ] } ], "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" } } } }