{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched: Fix out-of-bound access in uclamp\n\nUtil-clamp places tasks in different buckets based on their clamp values\nfor performance reasons. However, the size of buckets is currently\ncomputed using a rounding division, which can lead to an off-by-one\nerror in some configurations.\n\nFor instance, with 20 buckets, the bucket size will be 1024/20=51. A\ntask with a clamp of 1024 will be mapped to bucket id 1024/51=20. Sadly,\ncorrect indexes are in range [0,19], hence leading to an out of bound\nmemory access.\n\nClamp the bucket id to fix the issue."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "kernel/sched/core.c"
               ],
               "versions": [
                  {
                     "version": "69842cba9ace",
                     "lessThan": "687f523c134b",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "69842cba9ace",
                     "lessThan": "f7347c85490b",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "69842cba9ace",
                     "lessThan": "3da3f804b82a",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "69842cba9ace",
                     "lessThan": "42ee47c7e356",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "69842cba9ace",
                     "lessThan": "6d2f8909a5fa",
                     "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/sched/core.c"
               ],
               "versions": [
                  {
                     "version": "5.3",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.3",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.120",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.38",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.11.22",
                     "lessThanOrEqual": "5.11.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.12.5",
                     "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/687f523c134b7f0bd040ee1230f6d17990d54172"
            },
            {
               "url": "https://git.kernel.org/stable/c/f7347c85490b92dd144fa1fba9e1eca501656ab3"
            },
            {
               "url": "https://git.kernel.org/stable/c/3da3f804b82a0a382d523a21acf4cf3bb35f936d"
            },
            {
               "url": "https://git.kernel.org/stable/c/42ee47c7e3569d9a0e2cb5053c496d97d380472f"
            },
            {
               "url": "https://git.kernel.org/stable/c/6d2f8909a5fabb73fe2a63918117943986c39b6c"
            }
         ],
         "title": "sched: Fix out-of-bound access in uclamp",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-46993",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}