{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-74744",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-15T05:44:03.931Z",
        "datePublished": "2026-08-26T14:36:54.773Z",
        "dateUpdated": "2026-08-26T14:36:54.773Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-26T14:36:54.773Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipvlan: inherit needed_headroom and needed_tailroom from phy_dev\n\nipvlan devices inherit hard_header_len from phy_dev during ipvlan_init(),\nbut leave needed_headroom and needed_tailroom set to 0.\n\nWhen the underlying phy_dev (or stacked lower device) requires extra headroom\nor tailroom for headers/trailers (e.g. macsec, ipsec, wireguard, tunnels, or\nveth with rx headroom), upper layers calculating packet headroom and tailroom\nfail to reserve sufficient space.\n\nThis can result in reallocation overhead, skb headroom underflows, or KASAN\nslab-use-after-free crashes when dev_hard_header() / ipvlan_hard_header()\nprepends header data or when lower devices append tailroom.\n\nFix this by:\n1. Inheriting needed_headroom and needed_tailroom from phy_dev in ipvlan_init().\n2. Propagating needed_headroom and needed_tailroom updates to attached ipvlans\n   in ipvlan_device_event() when receiving NETDEV_FEAT_CHANGE events."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ipvlan/ipvlan_main.c"
                    ],
                    "versions": [
                        {
                            "version": "2ad7bf3638411cb547f2823df08166c13ab04269",
                            "lessThan": "af602c4d0ee548da18e2409b4b4da1079625a372",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2ad7bf3638411cb547f2823df08166c13ab04269",
                            "lessThan": "f3c17ff65f54781cde696e16a6c577615ed735aa",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2ad7bf3638411cb547f2823df08166c13ab04269",
                            "lessThan": "c0fbe31f6b20ade0465130685859faa5c86fda59",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2ad7bf3638411cb547f2823df08166c13ab04269",
                            "lessThan": "5f33188457bbcc1b11ca87084037963c516ed3d9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2ad7bf3638411cb547f2823df08166c13ab04269",
                            "lessThan": "5c2ca77212eb38559b0353b8363b7a84f4b019dd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2ad7bf3638411cb547f2823df08166c13ab04269",
                            "lessThan": "e16e960d55a40d36bd7c2494cc005e757dc9a1ef",
                            "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/net/ipvlan/ipvlan_main.c"
                    ],
                    "versions": [
                        {
                            "version": "3.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.19",
                            "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": "3.19",
                                    "versionEndExcluding": "6.1.184"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "6.6.153"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "6.12.105"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "6.18.46"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "7.1.10"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/af602c4d0ee548da18e2409b4b4da1079625a372"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f3c17ff65f54781cde696e16a6c577615ed735aa"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c0fbe31f6b20ade0465130685859faa5c86fda59"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5f33188457bbcc1b11ca87084037963c516ed3d9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5c2ca77212eb38559b0353b8363b7a84f4b019dd"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e16e960d55a40d36bd7c2494cc005e757dc9a1ef"
                }
            ],
            "title": "ipvlan: inherit needed_headroom and needed_tailroom from phy_dev",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}