{
  "cveId": "CVE-2021-46993",
  "url": "https://patchblox.com/security/cve/CVE-2021-46993",
  "summary": "CVE-2021-46993 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-46993, released February 28, 2024. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  sched: Fix out-of-bound access in uclamp  Util-c...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  sched: Fix out-of-bound access in uclamp  Util-clamp places tasks in different buckets based on their clamp values for performance reasons. However, the size of buckets is currently computed using a rounding division, which can lead to an off-by-one error in some configurations.  For instance, with 20 buckets, the bucket size will be 1024/20=51. A task with a clamp of 1024 will be mapped to bucket id 1024/51=20. Sadly, correct indexes are in range [0,19], hence leading to an out of bound memory access.  Clamp the bucket id to fix the issue.",
  "published": "2024-02-28T09:15:37Z",
  "severity": "high",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
  "epss": 0.00243,
  "epssPercentile": 0.15588,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.10.38-1",
      "fix": "DEBIAN-CVE-2021-46993",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-46993",
      "released": "2024-02-28T09:15:37Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.10.38-1",
      "fix": "DEBIAN-CVE-2021-46993",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-46993",
      "released": "2024-02-28T09:15:37Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.10.38-1",
      "fix": "DEBIAN-CVE-2021-46993",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-46993",
      "released": "2024-02-28T09:15:37Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}