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CVE-2021-47612 (GCVE-0-2021-47612)

Vulnerability from cvelistv5 – Published: 2024-06-19 14:58 – Updated: 2026-05-11 13:57
VLAI
Title
nfc: fix segfault in nfc_genl_dump_devices_done
Summary
In the Linux kernel, the following vulnerability has been resolved: nfc: fix segfault in nfc_genl_dump_devices_done When kmalloc in nfc_genl_dump_devices() fails then nfc_genl_dump_devices_done() segfaults as below KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 25 Comm: kworker/0:1 Not tainted 5.16.0-rc4-01180-g2a987e65025e-dirty #5 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-6.fc35 04/01/2014 Workqueue: events netlink_sock_destruct_work RIP: 0010:klist_iter_exit+0x26/0x80 Call Trace: <TASK> class_dev_iter_exit+0x15/0x20 nfc_genl_dump_devices_done+0x3b/0x50 genl_lock_done+0x84/0xd0 netlink_sock_destruct+0x8f/0x270 __sk_destruct+0x64/0x3b0 sk_destruct+0xa8/0xd0 __sk_free+0x2e8/0x3d0 sk_free+0x51/0x90 netlink_sock_destruct_work+0x1c/0x20 process_one_work+0x411/0x710 worker_thread+0x6fd/0xa80
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-20 13:23 UTC
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 4d12b8b129f170d0fc3188de1e51a2a1b0f87730 , < ea55b3797878752aa076b118afb727dcf79cac34 (git)
Affected: 4d12b8b129f170d0fc3188de1e51a2a1b0f87730 , < 214af18abbe39db05beb305b2d11e87d09a6529c (git)
Affected: 4d12b8b129f170d0fc3188de1e51a2a1b0f87730 , < 6644989642844de830f9b072cd65c553cb55946c (git)
Affected: 4d12b8b129f170d0fc3188de1e51a2a1b0f87730 , < 2a8845b9603c545fddd17862282dc4c4ce0971e3 (git)
Affected: 4d12b8b129f170d0fc3188de1e51a2a1b0f87730 , < d731ecc6f2eaec68f4ad1542283bbc7d07bd0112 (git)
Affected: 4d12b8b129f170d0fc3188de1e51a2a1b0f87730 , < c602863ad28ec86794cb4ab4edea5324f555f181 (git)
Affected: 4d12b8b129f170d0fc3188de1e51a2a1b0f87730 , < d89e4211b51752daf063d638af50abed2fd5f96d (git)
Affected: 4d12b8b129f170d0fc3188de1e51a2a1b0f87730 , < fd79a0cbf0b2e34bcc45b13acf962e2032a82203 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.1
Unaffected: 0 , < 3.1 (semver)
Unaffected: 4.4.296 , ≤ 4.4.* (semver)
Unaffected: 4.9.294 , ≤ 4.9.* (semver)
Unaffected: 4.14.259 , ≤ 4.14.* (semver)
Unaffected: 4.19.222 , ≤ 4.19.* (semver)
Unaffected: 5.4.167 , ≤ 5.4.* (semver)
Unaffected: 5.10.87 , ≤ 5.10.* (semver)
Unaffected: 5.15.10 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website

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          },
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2021-47612",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2024-06-20T13:23:29.231566Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2024-06-20T13:23:55.174Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "net/nfc/netlink.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "ea55b3797878752aa076b118afb727dcf79cac34",
                  "status": "affected",
                  "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                  "versionType": "git"
                },
                {
                  "lessThan": "214af18abbe39db05beb305b2d11e87d09a6529c",
                  "status": "affected",
                  "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                  "versionType": "git"
                },
                {
                  "lessThan": "6644989642844de830f9b072cd65c553cb55946c",
                  "status": "affected",
                  "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                  "versionType": "git"
                },
                {
                  "lessThan": "2a8845b9603c545fddd17862282dc4c4ce0971e3",
                  "status": "affected",
                  "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                  "versionType": "git"
                },
                {
                  "lessThan": "d731ecc6f2eaec68f4ad1542283bbc7d07bd0112",
                  "status": "affected",
                  "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                  "versionType": "git"
                },
                {
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                  "status": "affected",
                  "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                  "versionType": "git"
                },
                {
                  "lessThan": "d89e4211b51752daf063d638af50abed2fd5f96d",
                  "status": "affected",
                  "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                  "versionType": "git"
                },
                {
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                  "status": "affected",
                  "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "net/nfc/netlink.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThanOrEqual": "4.4.*",
                  "status": "unaffected",
                  "version": "4.4.296",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.9.*",
                  "status": "unaffected",
                  "version": "4.9.294",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.14.*",
                  "status": "unaffected",
                  "version": "4.14.259",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.19.*",
                  "status": "unaffected",
                  "version": "4.19.222",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.4.*",
                  "status": "unaffected",
                  "version": "5.4.167",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.87",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.10",
                  "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": "4.4.296",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.9.294",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.14.259",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.19.222",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.4.167",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.87",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.16",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: fix segfault in nfc_genl_dump_devices_done\n\nWhen kmalloc in nfc_genl_dump_devices() fails then\nnfc_genl_dump_devices_done() segfaults as below\n\nKASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\nCPU: 0 PID: 25 Comm: kworker/0:1 Not tainted 5.16.0-rc4-01180-g2a987e65025e-dirty #5\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-6.fc35 04/01/2014\nWorkqueue: events netlink_sock_destruct_work\nRIP: 0010:klist_iter_exit+0x26/0x80\nCall Trace:\n\u003cTASK\u003e\nclass_dev_iter_exit+0x15/0x20\nnfc_genl_dump_devices_done+0x3b/0x50\ngenl_lock_done+0x84/0xd0\nnetlink_sock_destruct+0x8f/0x270\n__sk_destruct+0x64/0x3b0\nsk_destruct+0xa8/0xd0\n__sk_free+0x2e8/0x3d0\nsk_free+0x51/0x90\nnetlink_sock_destruct_work+0x1c/0x20\nprocess_one_work+0x411/0x710\nworker_thread+0x6fd/0xa80"
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-12-10T07:12:45.302Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/ea55b3797878752aa076b118afb727dcf79cac34"
            },
            {
              "url": "https://git.kernel.org/stable/c/214af18abbe39db05beb305b2d11e87d09a6529c"
            },
            {
              "url": "https://git.kernel.org/stable/c/6644989642844de830f9b072cd65c553cb55946c"
            },
            {
              "url": "https://git.kernel.org/stable/c/2a8845b9603c545fddd17862282dc4c4ce0971e3"
            },
            {
              "url": "https://git.kernel.org/stable/c/d731ecc6f2eaec68f4ad1542283bbc7d07bd0112"
            },
            {
              "url": "https://git.kernel.org/stable/c/c602863ad28ec86794cb4ab4edea5324f555f181"
            },
            {
              "url": "https://git.kernel.org/stable/c/d89e4211b51752daf063d638af50abed2fd5f96d"
            },
            {
              "url": "https://git.kernel.org/stable/c/fd79a0cbf0b2e34bcc45b13acf962e2032a82203"
            }
          ],
          "title": "nfc: fix segfault in nfc_genl_dump_devices_done",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2021-47612",
        "datePublished": "2024-06-19T14:58:01.108Z",
        "dateReserved": "2024-06-19T14:55:32.795Z",
        "dateUpdated": "2025-12-10T07:12:45.302Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.

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Detection rules are retrieved from Rulezet.

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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.


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