cve/published/2021/CVE-2021-47604.json

{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvduse: check that offset is within bounds in get_config()\n\nThis condition checks \"len\" but it does not check \"offset\" and that\ncould result in an out of bounds read if \"offset > dev->config_size\".\nThe problem is that since both variables are unsigned the\n\"dev->config_size - offset\" subtraction would result in a very high\nunsigned value.\n\nI think these checks might not be necessary because \"len\" and \"offset\"\nare supposed to already have been validated using the\nvhost_vdpa_config_validate() function.  But I do not know the code\nperfectly, and I like to be safe."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/vdpa/vdpa_user/vduse_dev.c"
               ],
               "versions": [
                  {
                     "version": "c8a6153b6c59d95c0e091f053f6f180952ade91e",
                     "lessThan": "ebbbc5fea3f648175df1aa3f127c78eb0252cc2a",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "c8a6153b6c59d95c0e091f053f6f180952ade91e",
                     "lessThan": "dc1db0060c02d119fd4196924eff2d1129e9a442",
                     "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/vdpa/vdpa_user/vduse_dev.c"
               ],
               "versions": [
                  {
                     "version": "5.15",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.15",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "5.15.11",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "5.16",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "cpeApplicability": [
            {
               "nodes": [
                  {
                     "operator": "OR",
                     "negate": false,
                     "cpeMatch": [
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "5.15",
                           "versionEndExcluding": "5.15.11"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "5.15",
                           "versionEndExcluding": "5.16"
                        }
                     ]
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/ebbbc5fea3f648175df1aa3f127c78eb0252cc2a"
            },
            {
               "url": "https://git.kernel.org/stable/c/dc1db0060c02d119fd4196924eff2d1129e9a442"
            }
         ],
         "title": "vduse: check that offset is within bounds in get_config()",
         "x_generator": {
            "engine": "bippy-1.2.0"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47604",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}