{
  "cveId": "CVE-2021-47554",
  "url": "https://patchblox.com/security/cve/CVE-2021-47554",
  "summary": "CVE-2021-47554 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47554, 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:  vdpa_sim: avoid putting an uninitialized iova_do...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  vdpa_sim: avoid putting an uninitialized iova_domain  The system will crash if we put an uninitialized iova_domain, this could happen when an error occurs before initializing the iova_domain in vdpasim_create().  BUG: kernel NULL pointer dereference, address: 0000000000000000 ... RIP: 0010:__cpuhp_state_remove_instance\u002B0x96/0x1c0 ... Call Trace:  \u003CTASK\u003E  put_iova_domain\u002B0x29/0x220  vdpasim_free\u002B0xd1/0x120 [vdpa_sim]  vdpa_release_dev\u002B0x21/0x40 [vdpa]  device_release\u002B0x33/0x90  kobject_release\u002B0x63/0x160  vdpasim_create\u002B0x127/0x2a0 [vdpa_sim]  vdpasim_net_dev_add\u002B0x7d/0xfe [vdpa_sim_net]  vdpa_nl_cmd_dev_add_set_doit\u002B0xe1/0x1a0 [vdpa]  genl_family_rcv_msg_doit\u002B0x112/0x140  genl_rcv_msg\u002B0xdf/0x1d0  ...  So we must make sure the iova_domain is already initialized before put it.  In addition, we may get the following warning in this case: WARNING: ... drivers/iommu/iova.c:344 iova_cache_put\u002B0x58/0x70  So we must make sure the iova_cache_put() is invoked only if the iova_cache_get() is already invoked. Let\u0027s fix it together.",
  "published": "2024-05-24T15:15:20Z",
  "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": 0.00195,
  "epssPercentile": 0.09257,
  "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-2021-47554",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47554",
      "released": "2024-05-24T15:15:20Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-47554",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47554",
      "released": "2024-05-24T15:15:20Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-47554",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47554",
      "released": "2024-05-24T15:15:20Z"
    }
  ],
  "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"
  }
}