{
   "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/smc: Transitional solution for clcsock race issue\n\nWe encountered a crash in smc_setsockopt() and it is caused by\naccessing smc->clcsock after clcsock was released.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000020\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: 0000 [#1] PREEMPT SMP PTI\n CPU: 1 PID: 50309 Comm: nginx Kdump: loaded Tainted: G E     5.16.0-rc4+ #53\n RIP: 0010:smc_setsockopt+0x59/0x280 [smc]\n Call Trace:\n  <TASK>\n  __sys_setsockopt+0xfc/0x190\n  __x64_sys_setsockopt+0x20/0x30\n  do_syscall_64+0x34/0x90\n  entry_SYSCALL_64_after_hwframe+0x44/0xae\n RIP: 0033:0x7f16ba83918e\n  </TASK>\n\nThis patch tries to fix it by holding clcsock_release_lock and\nchecking whether clcsock has already been released before access.\n\nIn case that a crash of the same reason happens in smc_getsockopt()\nor smc_switch_to_fallback(), this patch also checkes smc->clcsock\nin them too. And the caller of smc_switch_to_fallback() will identify\nwhether fallback succeeds according to the return value."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "net/smc/af_smc.c"
               ],
               "versions": [
                  {
                     "version": "fd57770dd198",
                     "lessThan": "38f0bdd548fd",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "fd57770dd198",
                     "lessThan": "4284225cd800",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "fd57770dd198",
                     "lessThan": "c0bf3d8a943b",
                     "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/smc/af_smc.c"
               ],
               "versions": [
                  {
                     "version": "5.1",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.1",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.19",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.16.5",
                     "lessThanOrEqual": "5.16.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.17",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/38f0bdd548fd2ef5d481b88d8a2bfef968452e34"
            },
            {
               "url": "https://git.kernel.org/stable/c/4284225cd8001e134f5cf533a7cd244bbb654d0f"
            },
            {
               "url": "https://git.kernel.org/stable/c/c0bf3d8a943b6f2e912b7c1de03e2ef28e76f760"
            }
         ],
         "title": "net/smc: Transitional solution for clcsock race issue",
         "x_generator": {
            "engine": "bippy-7d53e8ef8be4"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2022-48751",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}