{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2021-47309",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-05-21T14:28:16.972Z",
        "datePublished": "2024-05-21T14:35:27.981Z",
        "dateUpdated": "2024-08-04T05:32:08.596Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2024-05-29T05:05:42.863Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: validate lwtstate->data before returning from skb_tunnel_info()\n\nskb_tunnel_info() returns pointer of lwtstate->data as ip_tunnel_info\ntype without validation. lwtstate->data can have various types such as\nmpls_iptunnel_encap, etc and these are not compatible.\nSo skb_tunnel_info() should validate before returning that pointer.\n\nSplat looks like:\nBUG: KASAN: slab-out-of-bounds in vxlan_get_route+0x418/0x4b0 [vxlan]\nRead of size 2 at addr ffff888106ec2698 by task ping/811\n\nCPU: 1 PID: 811 Comm: ping Not tainted 5.13.0+ #1195\nCall Trace:\n dump_stack_lvl+0x56/0x7b\n print_address_description.constprop.8.cold.13+0x13/0x2ee\n ? vxlan_get_route+0x418/0x4b0 [vxlan]\n ? vxlan_get_route+0x418/0x4b0 [vxlan]\n kasan_report.cold.14+0x83/0xdf\n ? vxlan_get_route+0x418/0x4b0 [vxlan]\n vxlan_get_route+0x418/0x4b0 [vxlan]\n [ ... ]\n vxlan_xmit_one+0x148b/0x32b0 [vxlan]\n [ ... ]\n vxlan_xmit+0x25c5/0x4780 [vxlan]\n [ ... ]\n dev_hard_start_xmit+0x1ae/0x6e0\n __dev_queue_xmit+0x1f39/0x31a0\n [ ... ]\n neigh_xmit+0x2f9/0x940\n mpls_xmit+0x911/0x1600 [mpls_iptunnel]\n lwtunnel_xmit+0x18f/0x450\n ip_finish_output2+0x867/0x2040\n [ ... ]"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "include/net/dst_metadata.h"
                    ],
                    "versions": [
                        {
                            "version": "61adedf3e3f1",
                            "lessThan": "e7f3c9df4051",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "61adedf3e3f1",
                            "lessThan": "b61d327cd3cc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "61adedf3e3f1",
                            "lessThan": "83bdcfbd968b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "61adedf3e3f1",
                            "lessThan": "8bb1589c89e6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "61adedf3e3f1",
                            "lessThan": "8aa13a86964c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "61adedf3e3f1",
                            "lessThan": "2179d96ec702",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "61adedf3e3f1",
                            "lessThan": "a915379594f1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "61adedf3e3f1",
                            "lessThan": "67a9c9431740",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "include/net/dst_metadata.h"
                    ],
                    "versions": [
                        {
                            "version": "4.3",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.3",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "4.4.277",
                            "lessThanOrEqual": "4.4.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "4.9.277",
                            "lessThanOrEqual": "4.9.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "4.14.241",
                            "lessThanOrEqual": "4.14.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "4.19.199",
                            "lessThanOrEqual": "4.19.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.4.135",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.10.53",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.13.5",
                            "lessThanOrEqual": "5.13.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.14",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/e7f3c9df40515a6c6b46f36c4c94cf48a043f887"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b61d327cd3cc5ea591f3bf751dd11e034f388bb5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/83bdcfbd968bcc91a0632b7b625e4a9b0cba5e0d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8bb1589c89e61e3b182dd546f1021928ebb5c2a6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8aa13a86964cdec4fd969ef677c6614ff068641a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2179d96ec702cc33ead02a9ce40ece599b8538c5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a915379594f1e045421635c6316d8f3ffa018c58"
                },
                {
                    "url": "https://git.kernel.org/stable/c/67a9c94317402b826fc3db32afc8f39336803d97"
                }
            ],
            "title": "net: validate lwtstate->data before returning from skb_tunnel_info()",
            "x_generator": {
                "engine": "bippy-a5840b7849dd"
            }
        },
        "adp": [
            {
                "title": "CISA ADP Vulnrichment",
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2021-47309",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2024-05-23T19:12:00.559990Z"
                            }
                        }
                    }
                ],
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2024-06-04T17:14:34.709Z"
                }
            },
            {
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2024-08-04T05:32:08.596Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "https://git.kernel.org/stable/c/e7f3c9df40515a6c6b46f36c4c94cf48a043f887",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://git.kernel.org/stable/c/b61d327cd3cc5ea591f3bf751dd11e034f388bb5",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://git.kernel.org/stable/c/83bdcfbd968bcc91a0632b7b625e4a9b0cba5e0d",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://git.kernel.org/stable/c/8bb1589c89e61e3b182dd546f1021928ebb5c2a6",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://git.kernel.org/stable/c/8aa13a86964cdec4fd969ef677c6614ff068641a",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://git.kernel.org/stable/c/2179d96ec702cc33ead02a9ce40ece599b8538c5",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://git.kernel.org/stable/c/a915379594f1e045421635c6316d8f3ffa018c58",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://git.kernel.org/stable/c/67a9c94317402b826fc3db32afc8f39336803d97",
                        "tags": [
                            "x_transferred"
                        ]
                    }
                ]
            }
        ]
    }
}