{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Do not blindly read the ip address in ftrace_bug()\n\nIt was reported that a bug on arm64 caused a bad ip address to be used for\nupdating into a nop in ftrace_init(), but the error path (rightfully)\nreturned -EINVAL and not -EFAULT, as the bug caused more than one error to\noccur. But because -EINVAL was returned, the ftrace_bug() tried to report\nwhat was at the location of the ip address, and read it directly. This\ncaused the machine to panic, as the ip was not pointing to a valid memory\naddress.\n\nInstead, read the ip address with copy_from_kernel_nofault() to safely\naccess the memory, and if it faults, report that the address faulted,\notherwise report what was in that location."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "kernel/trace/ftrace.c"
               ],
               "versions": [
                  {
                     "version": "05736a427f7e",
                     "lessThan": "0bc62e398bbd",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "05736a427f7e",
                     "lessThan": "4aedc2bc2b32",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "05736a427f7e",
                     "lessThan": "acf671ba79c1",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "05736a427f7e",
                     "lessThan": "862dcc14f280",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "05736a427f7e",
                     "lessThan": "7e4e824b109f",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "05736a427f7e",
                     "lessThan": "97524384762c",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "05736a427f7e",
                     "lessThan": "3e4ddeb68751",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "05736a427f7e",
                     "lessThan": "6c14133d2d3f",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "kernel/trace/ftrace.c"
               ],
               "versions": [
                  {
                     "version": "2.6.28",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "2.6.28",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.4.273",
                     "lessThanOrEqual": "4.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.9.273",
                     "lessThanOrEqual": "4.9.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.14.237",
                     "lessThanOrEqual": "4.14.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.195",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.126",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.44",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.12.11",
                     "lessThanOrEqual": "5.12.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.13",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/0bc62e398bbd9e600959e610def5109957437b28"
            },
            {
               "url": "https://git.kernel.org/stable/c/4aedc2bc2b32c93555f47c95610efb89cc1ec09b"
            },
            {
               "url": "https://git.kernel.org/stable/c/acf671ba79c1feccc3ec7cfdcffead4efcec49e7"
            },
            {
               "url": "https://git.kernel.org/stable/c/862dcc14f2803c556bdd73b43c27b023fafce2fb"
            },
            {
               "url": "https://git.kernel.org/stable/c/7e4e824b109f1d41ccf223fbb0565d877d6223a2"
            },
            {
               "url": "https://git.kernel.org/stable/c/97524384762c1fb9b3ded931498dd2047bd0de81"
            },
            {
               "url": "https://git.kernel.org/stable/c/3e4ddeb68751fb4fb657199aed9cfd5d02796875"
            },
            {
               "url": "https://git.kernel.org/stable/c/6c14133d2d3f768e0a35128faac8aa6ed4815051"
            }
         ],
         "title": "ftrace: Do not blindly read the ip address in ftrace_bug()",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47276",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}