{
  "cveId": "CVE-2021-47523",
  "url": "https://patchblox.com/security/cve/CVE-2021-47523",
  "summary": "CVE-2021-47523 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47523, released May 24, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  IB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr  Th...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  IB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr  This buffer is currently allocated in hfi1_init():  \tif (reinit) \t\tret = init_after_reset(dd); \telse \t\tret = loadtime_init(dd); \tif (ret) \t\tgoto done;  \t/* allocate dummy tail memory for all receive contexts */ \tdd-\u003Ercvhdrtail_dummy_kvaddr = dma_alloc_coherent(\u0026dd-\u003Epcidev-\u003Edev, \t\t\t\t\t\t\t sizeof(u64), \t\t\t\t\t\t\t \u0026dd-\u003Ercvhdrtail_dummy_dma, \t\t\t\t\t\t\t GFP_KERNEL);  \tif (!dd-\u003Ercvhdrtail_dummy_kvaddr) { \t\tdd_dev_err(dd, \u0022cannot allocate dummy tail memory\\n\u0022); \t\tret = -ENOMEM; \t\tgoto done; \t}  The reinit triggered path will overwrite the old allocation and leak it.  Fix by moving the allocation to hfi1_alloc_devdata() and the deallocation to hfi1_free_devdata().",
  "published": "2024-05-24T15:15:14Z",
  "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": 0.00239,
  "epssPercentile": 0.15027,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-47523",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47523",
      "released": "2024-05-24T15:15:14Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-47523",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47523",
      "released": "2024-05-24T15:15:14Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-47523",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47523",
      "released": "2024-05-24T15:15:14Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}