{
  "cveId": "CVE-2021-47421",
  "url": "https://patchblox.com/security/cve/CVE-2021-47421",
  "summary": "CVE-2021-47421 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47421, 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:  drm/amdgpu: handle the case of pci_channel_io_fr...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  drm/amdgpu: handle the case of pci_channel_io_frozen only in amdgpu_pci_resume  In current code, when a PCI error state pci_channel_io_normal is detectd, it will report PCI_ERS_RESULT_CAN_RECOVER status to PCI driver, and PCI driver will continue the execution of PCI resume callback report_resume by pci_walk_bridge, and the callback will go into amdgpu_pci_resume finally, where write lock is releasd unconditionally without acquiring such lock first. In this case, a deadlock will happen when other threads start to acquire the read lock.  To fix this, add a member in amdgpu_device strucutre to cache pci_channel_state, and only continue the execution in amdgpu_pci_resume when it\u0027s pci_channel_io_frozen.",
  "published": "2024-05-21T15:15:27Z",
  "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": 0.00206,
  "epssPercentile": 0.10675,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.14.12-1",
      "fix": "DEBIAN-CVE-2021-47421",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47421",
      "released": "2024-05-21T15:15:27Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.14.12-1",
      "fix": "DEBIAN-CVE-2021-47421",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47421",
      "released": "2024-05-21T15:15:27Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.14.12-1",
      "fix": "DEBIAN-CVE-2021-47421",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47421",
      "released": "2024-05-21T15:15:27Z"
    }
  ],
  "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"
  }
}