{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: bridge: replace physindev with physinif in nf_bridge_info\n\nAn skb can be added to a neigh->arp_queue while waiting for an arp\nreply. Where original skb's skb->dev can be different to neigh's\nneigh->dev. For instance in case of bridging dnated skb from one veth to\nanother, the skb would be added to a neigh->arp_queue of the bridge.\n\nAs skb->dev can be reset back to nf_bridge->physindev and used, and as\nthere is no explicit mechanism that prevents this physindev from been\nfreed under us (for instance neigh_flush_dev doesn't cleanup skbs from\ndifferent device's neigh queue) we can crash on e.g. this stack:\n\narp_process\n  neigh_update\n    skb = __skb_dequeue(&neigh->arp_queue)\n      neigh_resolve_output(..., skb)\n        ...\n          br_nf_dev_xmit\n            br_nf_pre_routing_finish_bridge_slow\n              skb->dev = nf_bridge->physindev\n              br_handle_frame_finish\n\nLet's use plain ifindex instead of net_device link. To peek into the\noriginal net_device we will use dev_get_by_index_rcu(). Thus either we\nget device and are safe to use it or we don't get it and drop skb."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "include/linux/netfilter_bridge.h",
                  "include/linux/skbuff.h",
                  "net/bridge/br_netfilter_hooks.c",
                  "net/bridge/br_netfilter_ipv6.c",
                  "net/ipv4/netfilter/nf_reject_ipv4.c",
                  "net/ipv6/netfilter/nf_reject_ipv6.c"
               ],
               "versions": [
                  {
                     "version": "c4e70a87d975",
                     "lessThan": "7ae19ee81ca5",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "c4e70a87d975",
                     "lessThan": "9325e3188a9c",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "c4e70a87d975",
                     "lessThan": "544add1f1cfb",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "c4e70a87d975",
                     "lessThan": "9874808878d9",
                     "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/linux/netfilter_bridge.h",
                  "include/linux/skbuff.h",
                  "net/bridge/br_netfilter_hooks.c",
                  "net/bridge/br_netfilter_ipv6.c",
                  "net/ipv4/netfilter/nf_reject_ipv4.c",
                  "net/ipv6/netfilter/nf_reject_ipv6.c"
               ],
               "versions": [
                  {
                     "version": "4.2",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "4.2",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.75",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.14",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.7.2",
                     "lessThanOrEqual": "6.7.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.8",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/7ae19ee81ca56b13c50a78de6c47d5b8fdc9d97b"
            },
            {
               "url": "https://git.kernel.org/stable/c/9325e3188a9cf3f69fc6f32af59844bbc5b90547"
            },
            {
               "url": "https://git.kernel.org/stable/c/544add1f1cfb78c3dfa3e6edcf4668f6be5e730c"
            },
            {
               "url": "https://git.kernel.org/stable/c/9874808878d9eed407e3977fd11fee49de1e1d86"
            }
         ],
         "title": "netfilter: bridge: replace physindev with physinif in nf_bridge_info",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-35839",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}