{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-80584",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-26T14:34:25.769Z",
        "datePublished": "2026-08-26T14:37:40.302Z",
        "dateUpdated": "2026-08-26T14:37:40.302Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-26T14:37:40.302Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/qeth: validate user buffer length in SNMP and ARP query ioctls\n\nqeth_snmp_command() and qeth_l3_arp_query() allocate a buffer sized by\na user-supplied length (udata_len) without checking a lower bound, then\nset udata_offset to a fixed non-zero value and pass both to a reply\ncallback. The callback bounds-checks the copy with\n\n        if ((udata_len - udata_offset) < len)\n\nBoth fields are u32, so a udata_len smaller than udata_offset makes the\nsubtraction wrap and the check pass, and the following memcpy() writes\npast the allocation. A udata_len of 0 also yields ZERO_SIZE_PTR from\nkzalloc(), which the existing NULL check does not catch.\n\nReject buffers smaller than udata_offset before allocating, so the\ncallback subtraction can no longer underflow."
                }
            ],
            "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",
                        "drivers/s390/net/qeth_l3_main.c"
                    ],
                    "versions": [
                        {
                            "version": "4a71df50047f0db65ea09b1be155852e81a45eba",
                            "lessThan": "9d00eeb2d27f4cc817c5e408760226d43f811ec6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4a71df50047f0db65ea09b1be155852e81a45eba",
                            "lessThan": "46443eaddebd84c51940857b11787229be169dec",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4a71df50047f0db65ea09b1be155852e81a45eba",
                            "lessThan": "91935843f9396a9e45253e2c0d4337ca1371754b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4a71df50047f0db65ea09b1be155852e81a45eba",
                            "lessThan": "cc423f4105fe145b33e1d7cad34245a798358f73",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4a71df50047f0db65ea09b1be155852e81a45eba",
                            "lessThan": "3083818e67bcd656965797fbac9a3d6c1d44f78a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4a71df50047f0db65ea09b1be155852e81a45eba",
                            "lessThan": "a3083647747942ea32faf14560d6397ff3068046",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4a71df50047f0db65ea09b1be155852e81a45eba",
                            "lessThan": "75fb3151513d7d9f77a8f9545418279b119c06b8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4a71df50047f0db65ea09b1be155852e81a45eba",
                            "lessThan": "d141f087b1af656f055d7c5793a3e87817ba0bbe",
                            "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",
                        "drivers/s390/net/qeth_l3_main.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.26",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.26",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.266",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.217",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.184",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.153",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.105",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.46",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.10",
                            "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": "2.6.26",
                                    "versionEndExcluding": "5.10.266"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "5.15.217"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "6.1.184"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "6.6.153"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "6.12.105"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "6.18.46"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "7.1.10"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/9d00eeb2d27f4cc817c5e408760226d43f811ec6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/46443eaddebd84c51940857b11787229be169dec"
                },
                {
                    "url": "https://git.kernel.org/stable/c/91935843f9396a9e45253e2c0d4337ca1371754b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cc423f4105fe145b33e1d7cad34245a798358f73"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3083818e67bcd656965797fbac9a3d6c1d44f78a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a3083647747942ea32faf14560d6397ff3068046"
                },
                {
                    "url": "https://git.kernel.org/stable/c/75fb3151513d7d9f77a8f9545418279b119c06b8"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d141f087b1af656f055d7c5793a3e87817ba0bbe"
                }
            ],
            "title": "s390/qeth: validate user buffer length in SNMP and ARP query ioctls",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}