{
  "cveId": "CVE-2021-47305",
  "url": "https://patchblox.com/security/cve/CVE-2021-47305",
  "summary": "CVE-2021-47305 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47305, released May 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  dma-buf/sync_file: Don\u0027t leak fences on merge fa...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  dma-buf/sync_file: Don\u0027t leak fences on merge failure  Each add_fence() call does a dma_fence_get() on the relevant fence.  In the error path, we weren\u0027t calling dma_fence_put() so all those fences got leaked.  Also, in the krealloc_array failure case, we weren\u0027t freeing the fences array.  Instead, ensure that i and fences are always zero-initialized and dma_fence_put() all the fences and kfree(fences) on every error path.",
  "published": "2024-05-21T15:15:18Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00238,
  "epssPercentile": 0.14966,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47305",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47305",
      "released": "2024-05-21T15:15:18Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47305",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47305",
      "released": "2024-05-21T15:15:18Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47305",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47305",
      "released": "2024-05-21T15:15:18Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}