{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nteam: fix null-ptr-deref when team device type is changed\n\nGet a null-ptr-deref bug as follows with reproducer [1].\n\nBUG: kernel NULL pointer dereference, address: 0000000000000228\n...\nRIP: 0010:vlan_dev_hard_header+0x35/0x140 [8021q]\n...\nCall Trace:\n <TASK>\n ? __die+0x24/0x70\n ? page_fault_oops+0x82/0x150\n ? exc_page_fault+0x69/0x150\n ? asm_exc_page_fault+0x26/0x30\n ? vlan_dev_hard_header+0x35/0x140 [8021q]\n ? vlan_dev_hard_header+0x8e/0x140 [8021q]\n neigh_connected_output+0xb2/0x100\n ip6_finish_output2+0x1cb/0x520\n ? nf_hook_slow+0x43/0xc0\n ? ip6_mtu+0x46/0x80\n ip6_finish_output+0x2a/0xb0\n mld_sendpack+0x18f/0x250\n mld_ifc_work+0x39/0x160\n process_one_work+0x1e6/0x3f0\n worker_thread+0x4d/0x2f0\n ? __pfx_worker_thread+0x10/0x10\n kthread+0xe5/0x120\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x34/0x50\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1b/0x30\n\n[1]\n$ teamd -t team0 -d -c '{\"runner\": {\"name\": \"loadbalance\"}}'\n$ ip link add name t-dummy type dummy\n$ ip link add link t-dummy name t-dummy.100 type vlan id 100\n$ ip link add name t-nlmon type nlmon\n$ ip link set t-nlmon master team0\n$ ip link set t-nlmon nomaster\n$ ip link set t-dummy up\n$ ip link set team0 up\n$ ip link set t-dummy.100 down\n$ ip link set t-dummy.100 master team0\n\nWhen enslave a vlan device to team device and team device type is changed\nfrom non-ether to ether, header_ops of team device is changed to\nvlan_header_ops. That is incorrect and will trigger null-ptr-deref\nfor vlan->real_dev in vlan_dev_hard_header() because team device is not\na vlan device.\n\nCache eth_header_ops in team_setup(), then assign cached header_ops to\nheader_ops of team net device when its type is changed from non-ether\nto ether to fix the bug."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/net/team/team.c",
                  "include/linux/if_team.h"
               ],
               "versions": [
                  {
                     "version": "1d76efe1577b",
                     "lessThan": "1779eb51b9cc",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1d76efe1577b",
                     "lessThan": "a7fb47b97111",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1d76efe1577b",
                     "lessThan": "c5f6478686bb",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1d76efe1577b",
                     "lessThan": "b44dd92e2afd",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1d76efe1577b",
                     "lessThan": "cd05eec2ee0c",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1d76efe1577b",
                     "lessThan": "2f0acb0736ec",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1d76efe1577b",
                     "lessThan": "cac50d9f5d87",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1d76efe1577b",
                     "lessThan": "492032760127",
                     "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/team/team.c",
                  "include/linux/if_team.h"
               ],
               "versions": [
                  {
                     "version": "3.7",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "3.7",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.14.327",
                     "lessThanOrEqual": "4.14.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.296",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.258",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.198",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.134",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.56",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.5.6",
                     "lessThanOrEqual": "6.5.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/1779eb51b9cc628cee551f252701a85a2a50a457"
            },
            {
               "url": "https://git.kernel.org/stable/c/a7fb47b9711101d2405b0eb1276fb1f9b9b270c7"
            },
            {
               "url": "https://git.kernel.org/stable/c/c5f6478686bb45f453031594ae19b6c9723a780d"
            },
            {
               "url": "https://git.kernel.org/stable/c/b44dd92e2afd89eb6e9d27616858e72a67bdc1a7"
            },
            {
               "url": "https://git.kernel.org/stable/c/cd05eec2ee0cc396813a32ef675634e403748255"
            },
            {
               "url": "https://git.kernel.org/stable/c/2f0acb0736ecc3eb85dc80ad2790d634dcb10b58"
            },
            {
               "url": "https://git.kernel.org/stable/c/cac50d9f5d876be32cb9aa21c74018468900284d"
            },
            {
               "url": "https://git.kernel.org/stable/c/492032760127251e5540a5716a70996bacf2a3fd"
            }
         ],
         "title": "team: fix null-ptr-deref when team device type is changed",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2023-52574",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}