{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2021-47459",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-05-22T06:20:56.197Z",
        "datePublished": "2024-05-22T06:23:21.061Z",
        "dateUpdated": "2024-09-11T17:33:25.941Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2024-05-29T05:08:18.676Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv\n\nIt will trigger UAF for rx_kref of j1939_priv as following.\n\n        cpu0                                    cpu1\nj1939_sk_bind(socket0, ndev0, ...)\nj1939_netdev_start\n                                        j1939_sk_bind(socket1, ndev0, ...)\n                                        j1939_netdev_start\nj1939_priv_set\n                                        j1939_priv_get_by_ndev_locked\nj1939_jsk_add\n.....\nj1939_netdev_stop\nkref_put_lock(&priv->rx_kref, ...)\n                                        kref_get(&priv->rx_kref, ...)\n                                        REFCOUNT_WARN(\"addition on 0;...\")\n\n====================================================\nrefcount_t: addition on 0; use-after-free.\nWARNING: CPU: 1 PID: 20874 at lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0\nRIP: 0010:refcount_warn_saturate+0x169/0x1e0\nCall Trace:\n j1939_netdev_start+0x68b/0x920\n j1939_sk_bind+0x426/0xeb0\n ? security_socket_bind+0x83/0xb0\n\nThe rx_kref's kref_get() and kref_put() should use j1939_netdev_lock to\nprotect."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/can/j1939/main.c"
                    ],
                    "versions": [
                        {
                            "version": "9d71dd0c7009",
                            "lessThan": "a0e47d2833b4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9d71dd0c7009",
                            "lessThan": "864e77771a24",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9d71dd0c7009",
                            "lessThan": "6e8811707e2d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9d71dd0c7009",
                            "lessThan": "d9d52a3ebd28",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/can/j1939/main.c"
                    ],
                    "versions": [
                        {
                            "version": "5.4",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.4",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.4.156",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.10.76",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.14.15",
                            "lessThanOrEqual": "5.14.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.15",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/a0e47d2833b4f65e6c799f28c6b636d36b8b936d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/864e77771a24c877aaf53aee019f78619cbcd668"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6e8811707e2df0c6ba920f0cad3a3bca7b42132f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d9d52a3ebd284882f5562c88e55991add5d01586"
                }
            ],
            "title": "can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv",
            "x_generator": {
                "engine": "bippy-a5840b7849dd"
            }
        },
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                    "dateUpdated": "2024-08-04T05:39:59.451Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
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                "metrics": [
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                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2021-47459",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
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                                        "Automatable": "no"
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                                "version": "2.0.3",
                                "timestamp": "2024-09-10T15:36:14.848678Z"
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                "title": "CISA ADP Vulnrichment",
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