Vulnerability-Lookup

FKIE_CVE-2021-47554

Vulnerability from fkie_nvd - Published: 2024-05-24 15:15 - Updated: 2026-06-17 04:17

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

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+0x96/0x1c0 ... Call Trace: <TASK> put_iova_domain+0x29/0x220 vdpasim_free+0xd1/0x120 [vdpa_sim] vdpa_release_dev+0x21/0x40 [vdpa] device_release+0x33/0x90 kobject_release+0x63/0x160 vdpasim_create+0x127/0x2a0 [vdpa_sim] vdpasim_net_dev_add+0x7d/0xfe [vdpa_sim_net] vdpa_nl_cmd_dev_add_set_doit+0xe1/0x1a0 [vdpa] genl_family_rcv_msg_doit+0x112/0x140 genl_rcv_msg+0xdf/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+0x58/0x70 So we must make sure the iova_cache_put() is invoked only if the iova_cache_get() is already invoked. Let's fix it together.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bb93ce4b150dde79f58e34103cbd1fe829796649	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e4d58ac67e63727aa45a4a26185876f598e8b3dd	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/bb93ce4b150dde79f58e34103cbd1fe829796649	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/e4d58ac67e63727aa45a4a26185876f598e8b3dd	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	5.16
linux	linux_kernel	5.16

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/vdpa/vdpa_sim/vdpa_sim.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e4d58ac67e63727aa45a4a26185876f598e8b3dd",
              "status": "affected",
              "version": "4080fc1067501707b9693b8003feae7d50d14e35",
              "versionType": "git"
            },
            {
              "lessThan": "bb93ce4b150dde79f58e34103cbd1fe829796649",
              "status": "affected",
              "version": "4080fc1067501707b9693b8003feae7d50d14e35",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/vdpa/vdpa_sim/vdpa_sim.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "lessThan": "5.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "04CC77DE-F12C-44D1-9EE6-C7604BB8817F",
              "versionEndExcluding": "5.15.6",
              "versionStartIncluding": "5.13",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "357AA433-37E8-4323-BFB2-3038D6E4B414",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "A73429BA-C2D9-4D0C-A75F-06A1CA8B3983",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvdpa_sim: avoid putting an uninitialized iova_domain\n\nThe system will crash if we put an uninitialized iova_domain, this\ncould happen when an error occurs before initializing the iova_domain\nin vdpasim_create().\n\nBUG: kernel NULL pointer dereference, address: 0000000000000000\n...\nRIP: 0010:__cpuhp_state_remove_instance+0x96/0x1c0\n...\nCall Trace:\n \u003cTASK\u003e\n put_iova_domain+0x29/0x220\n vdpasim_free+0xd1/0x120 [vdpa_sim]\n vdpa_release_dev+0x21/0x40 [vdpa]\n device_release+0x33/0x90\n kobject_release+0x63/0x160\n vdpasim_create+0x127/0x2a0 [vdpa_sim]\n vdpasim_net_dev_add+0x7d/0xfe [vdpa_sim_net]\n vdpa_nl_cmd_dev_add_set_doit+0xe1/0x1a0 [vdpa]\n genl_family_rcv_msg_doit+0x112/0x140\n genl_rcv_msg+0xdf/0x1d0\n ...\n\nSo we must make sure the iova_domain is already initialized before\nput it.\n\nIn addition, we may get the following warning in this case:\nWARNING: ... drivers/iommu/iova.c:344 iova_cache_put+0x58/0x70\n\nSo we must make sure the iova_cache_put() is invoked only if the\niova_cache_get() is already invoked. Let\u0027s fix it together."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux se ha solucionado la siguiente vulnerabilidad: vdpa_sim: evitar poner un iova_domain no inicializado El sistema se bloquear\u00e1 si ponemos un iova_domain no inicializado, esto podr\u00eda pasar cuando ocurre un error antes de inicializar el iova_domain en vdpasim_create(). ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 0000000000000000... RIP: 0010:__cpuhp_state_remove_instance+0x96/0x1c0... Seguimiento de llamadas:  put_iova_domain+0x29/0x220 vdpasim_free+0xd1/0x120 [vdpa_release_] desarrollo+0x21/0x40 [ vdpa] device_release+0x33/0x90 kobject_release+0x63/0x160 vdpasim_create+0x127/0x2a0 [vdpa_sim] vdpasim_net_dev_add+0x7d/0xfe [vdpa_sim_net] vdpa_nl_cmd_dev_add_set_doit+0xe1/0x1a0 [ vdpa] genl_family_rcv_msg_doit+0x112/0x140 genl_rcv_msg+0xdf/0x1d0 ... Entonces debemos asegurarnos de que iova_domain ya est\u00e9 inicializado antes de colocarlo. Adem\u00e1s, es posible que recibamos la siguiente advertencia en este caso: ADVERTENCIA: ... drivers/iommu/iova.c:344 iova_cache_put+0x58/0x70 Por lo tanto, debemos asegurarnos de que iova_cache_put() se invoque solo si iova_cache_get() es ya invocado. Arreglemoslo juntos."
    }
  ],
  "id": "CVE-2021-47554",
  "lastModified": "2026-06-17T04:17:45.417",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-47554",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-05-24T19:16:03.600031Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-05-24T15:15:20.160",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/bb93ce4b150dde79f58e34103cbd1fe829796649"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/e4d58ac67e63727aa45a4a26185876f598e8b3dd"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/bb93ce4b150dde79f58e34103cbd1fe829796649"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/e4d58ac67e63727aa45a4a26185876f598e8b3dd"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-908"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2021-47554 (GCVE-0-2021-47554)

Vulnerability from cvelistv5 – Published: 2024-05-24 15:09 – Updated: 2026-05-11 13:56

Title

vdpa_sim: avoid putting an uninitialized iova_domain

Summary

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-05-24 19:16 UTC

Assigner

Linux mitre root Scorecard

References

2 references

URL	Tags
https://git.kernel.org/stable/c/e4d58ac67e63727aa…
https://git.kernel.org/stable/c/bb93ce4b150dde79f…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 4080fc1067501707b9693b8003feae7d50d14e35 , < e4d58ac67e63727aa45a4a26185876f598e8b3dd (git) Affected: 4080fc1067501707b9693b8003feae7d50d14e35 , < bb93ce4b150dde79f58e34103cbd1fe829796649 (git)
Linux	Linux	Affected: 5.13 Unaffected: 0 , < 5.13 (semver) Unaffected: 5.15.6 , ≤ 5.15.* (semver) Unaffected: 5.16 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47554",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-05-24T19:16:03.600031Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-04T17:14:31.147Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:39:59.788Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/e4d58ac67e63727aa45a4a26185876f598e8b3dd"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/bb93ce4b150dde79f58e34103cbd1fe829796649"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/vdpa/vdpa_sim/vdpa_sim.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e4d58ac67e63727aa45a4a26185876f598e8b3dd",
              "status": "affected",
              "version": "4080fc1067501707b9693b8003feae7d50d14e35",
              "versionType": "git"
            },
            {
              "lessThan": "bb93ce4b150dde79f58e34103cbd1fe829796649",
              "status": "affected",
              "version": "4080fc1067501707b9693b8003feae7d50d14e35",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/vdpa/vdpa_sim/vdpa_sim.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "lessThan": "5.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.6",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.16",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvdpa_sim: avoid putting an uninitialized iova_domain\n\nThe system will crash if we put an uninitialized iova_domain, this\ncould happen when an error occurs before initializing the iova_domain\nin vdpasim_create().\n\nBUG: kernel NULL pointer dereference, address: 0000000000000000\n...\nRIP: 0010:__cpuhp_state_remove_instance+0x96/0x1c0\n...\nCall Trace:\n \u003cTASK\u003e\n put_iova_domain+0x29/0x220\n vdpasim_free+0xd1/0x120 [vdpa_sim]\n vdpa_release_dev+0x21/0x40 [vdpa]\n device_release+0x33/0x90\n kobject_release+0x63/0x160\n vdpasim_create+0x127/0x2a0 [vdpa_sim]\n vdpasim_net_dev_add+0x7d/0xfe [vdpa_sim_net]\n vdpa_nl_cmd_dev_add_set_doit+0xe1/0x1a0 [vdpa]\n genl_family_rcv_msg_doit+0x112/0x140\n genl_rcv_msg+0xdf/0x1d0\n ...\n\nSo we must make sure the iova_domain is already initialized before\nput it.\n\nIn addition, we may get the following warning in this case:\nWARNING: ... drivers/iommu/iova.c:344 iova_cache_put+0x58/0x70\n\nSo we must make sure the iova_cache_put() is invoked only if the\niova_cache_get() is already invoked. Let\u0027s fix it together."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T13:56:52.458Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e4d58ac67e63727aa45a4a26185876f598e8b3dd"
        },
        {
          "url": "https://git.kernel.org/stable/c/bb93ce4b150dde79f58e34103cbd1fe829796649"
        }
      ],
      "title": "vdpa_sim: avoid putting an uninitialized iova_domain",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47554",
    "datePublished": "2024-05-24T15:09:56.614Z",
    "dateReserved": "2024-05-24T15:02:54.833Z",
    "dateUpdated": "2026-05-11T13:56:52.458Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

FKIE_CVE-2021-47554

CVE-2021-47554 (GCVE-0-2021-47554)

Tags

Sightings

Nomenclature

Related by attack behaviour