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 (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
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)
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)
Create a notification for this product.
Show details on NVD website
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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\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nfc: corrige el error de segmentaci\u00f3n en nfc_genl_dump_devices_done Cuando falla kmalloc en nfc_genl_dump_devices(), entonces el error de segmentaci\u00f3n de nfc_genl_dump_devices_done() se muestra a continuaci\u00f3n KASAN: null-ptr-deref en el rango [0x0000000000000008-0x00 0000000000000f] CPU: 0 PID : 25 Comm: kworker/0:1 Not tainted 5.16.0-rc4-01180-g2a987e65025e-dirty #5 Nombre del hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS 1.14.0-6.fc35 04/01/ 2014 Cola de trabajo: eventos netlink_sock_destruct_work RIP: 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      "current_release_date": "2025-11-21T14:39:50+00:00",
      "cve": "CVE-2021-47612",
      "id": "CVE-2021-47612",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: nfc: fix segfault in nfc_genl_dump_devices_done",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47612.json",
      "version": "3"
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      "initial_release_date": "2024-06-21T03:52:07Z",
      "product_status:known_affected": "406",
      "product_status:known_not_affected": "70",
      "product_status:recommended": "510",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-47612",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-47612.json",
      "version": "65"
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{\"status\": \"unaffected\", \"version\": \"4.19.222\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.167\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.87\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.16\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/nfc/netlink.c\"], \"defaultStatus\": \"affected\"}], \"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\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.4.296\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.294\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.259\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.222\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.167\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.87\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.16\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-12-10T07:12:45.302Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47612\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-12-10T07:12:45.302Z\", \"dateReserved\": \"2024-06-19T14:55:32.795Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-06-19T14:58:01.108Z\", \"assignerShortName\": \"Linux\"}",
      "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.


Detection rules are retrieved from Rulezet.