{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: pm: Fix uaf in __timer_delete_sync\n\nThere are two paths to access mptcp_pm_del_add_timer, result in a race\ncondition:\n\n     CPU1\t\t\t\tCPU2\n     ====                               ====\n     net_rx_action\n     napi_poll                          netlink_sendmsg\n     __napi_poll                        netlink_unicast\n     process_backlog                    netlink_unicast_kernel\n     __netif_receive_skb                genl_rcv\n     __netif_receive_skb_one_core       netlink_rcv_skb\n     NF_HOOK                            genl_rcv_msg\n     ip_local_deliver_finish            genl_family_rcv_msg\n     ip_protocol_deliver_rcu            genl_family_rcv_msg_doit\n     tcp_v4_rcv                         mptcp_pm_nl_flush_addrs_doit\n     tcp_v4_do_rcv                      mptcp_nl_remove_addrs_list\n     tcp_rcv_established                mptcp_pm_remove_addrs_and_subflows\n     tcp_data_queue                     remove_anno_list_by_saddr\n     mptcp_incoming_options             mptcp_pm_del_add_timer\n     mptcp_pm_del_add_timer             kfree(entry)\n\nIn remove_anno_list_by_saddr(running on CPU2), after leaving the critical\nzone protected by \"pm.lock\", the entry will be released, which leads to the\noccurrence of uaf in the mptcp_pm_del_add_timer(running on CPU1).\n\nKeeping a reference to add_timer inside the lock, and calling\nsk_stop_timer_sync() with this reference, instead of \"entry->add_timer\".\n\nMove list_del(&entry->list) to mptcp_pm_del_add_timer and inside the pm lock,\ndo not directly access any members of the entry outside the pm lock, which\ncan avoid similar \"entry->x\" uaf."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "net/mptcp/pm_netlink.c"
               ],
               "versions": [
                  {
                     "version": "00cfd77b9063",
                     "lessThan": "0e7814b028cd",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "00cfd77b9063",
                     "lessThan": "3554482f4691",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "00cfd77b9063",
                     "lessThan": "67409b358500",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "00cfd77b9063",
                     "lessThan": "6452b162549c",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "00cfd77b9063",
                     "lessThan": "12134a652b0a",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "00cfd77b9063",
                     "lessThan": "b4cd80b03389",
                     "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/mptcp/pm_netlink.c"
               ],
               "versions": [
                  {
                     "version": "5.10",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.10",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.227",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.168",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.111",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.52",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.10.11",
                     "lessThanOrEqual": "6.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.11",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/0e7814b028cd50b3ff79659d23dfa9da6a1e75e1"
            },
            {
               "url": "https://git.kernel.org/stable/c/3554482f4691571fc4b5490c17ae26896e62171c"
            },
            {
               "url": "https://git.kernel.org/stable/c/67409b358500c71632116356a0b065f112d7b707"
            },
            {
               "url": "https://git.kernel.org/stable/c/6452b162549c7f9ef54655d3fb9977b9192e6e5b"
            },
            {
               "url": "https://git.kernel.org/stable/c/12134a652b0a10064844ea235173e70246eba6dc"
            },
            {
               "url": "https://git.kernel.org/stable/c/b4cd80b0338945a94972ac3ed54f8338d2da2076"
            }
         ],
         "title": "mptcp: pm: Fix uaf in __timer_delete_sync",
         "x_generator": {
            "engine": "bippy-c9c4e1df01b2"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-46858",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}