{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "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"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47309",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}