{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-71079", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:30:19.648Z", "datePublished": "2026-01-13T15:34:44.136Z", "dateUpdated": "2026-05-11T21:54:19.898Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:54:19.898Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: nfc: fix deadlock between nfc_unregister_device and rfkill_fop_write\n\nA deadlock can occur between nfc_unregister_device() and rfkill_fop_write()\ndue to lock ordering inversion between device_lock and rfkill_global_mutex.\n\nThe problematic lock order is:\n\nThread A (rfkill_fop_write):\n rfkill_fop_write()\n mutex_lock(&rfkill_global_mutex)\n rfkill_set_block()\n nfc_rfkill_set_block()\n nfc_dev_down()\n device_lock(&dev->dev) <- waits for device_lock\n\nThread B (nfc_unregister_device):\n nfc_unregister_device()\n device_lock(&dev->dev)\n rfkill_unregister()\n mutex_lock(&rfkill_global_mutex) <- waits for rfkill_global_mutex\n\nThis creates a classic ABBA deadlock scenario.\n\nFix this by moving rfkill_unregister() and rfkill_destroy() outside the\ndevice_lock critical section. Store the rfkill pointer in a local variable\nbefore releasing the lock, then call rfkill_unregister() after releasing\ndevice_lock.\n\nThis change is safe because rfkill_fop_write() holds rfkill_global_mutex\nwhile calling the rfkill callbacks, and rfkill_unregister() also acquires\nrfkill_global_mutex before cleanup. Therefore, rfkill_unregister() will\nwait for any ongoing callback to complete before proceeding, and\ndevice_del() is only called after rfkill_unregister() returns, preventing\nany use-after-free.\n\nThe similar lock ordering in nfc_register_device() (device_lock ->\nrfkill_global_mutex via rfkill_register) is safe because during\nregistration the device is not yet in rfkill_list, so no concurrent\nrfkill operations can occur on this device."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/nfc/core.c"], "versions": [{"version": "73a0d12114b4bc1a9def79a623264754b9df698e", "lessThan": "2e0831e9fc46a06daa6d4d8d57a2738e343130c3", "status": "affected", "versionType": "git"}, {"version": "8a9c61c3ef187d8891225f9b932390670a43a0d3", "lessThan": "e02a1c33f10a0ed3aba855ab8ae2b6c4c5be8012", "status": "affected", "versionType": "git"}, {"version": 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Store the rfkill pointer in a local variable\nbefore releasing the lock, then call rfkill_unregister() after releasing\ndevice_lock.\n\nThis change is safe because rfkill_fop_write() holds rfkill_global_mutex\nwhile calling the rfkill callbacks, and rfkill_unregister() also acquires\nrfkill_global_mutex before cleanup. Therefore, rfkill_unregister() will\nwait for any ongoing callback to complete before proceeding, and\ndevice_del() is only called after rfkill_unregister() returns, preventing\nany use-after-free.\n\nThe similar lock ordering in nfc_register_device() (device_lock ->\nrfkill_global_mutex via rfkill_register) is safe because during\nregistration the device is not yet in rfkill_list, so no concurrent\nrfkill operations can occur on this device."}], "id": "CVE-2025-71079", "lastModified": "2026-03-25T19:44:18.643", "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"}]}, "published": "2026-01-13T16:16:07.433", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1ab526d97a57e44d26fadcc0e9adeb9c0c0182f5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2e0831e9fc46a06daa6d4d8d57a2738e343130c3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6b93c8ab6f6cda8818983a4ae3fcf84b023037b4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8fc4632fb508432895430cd02b38086bdd649083"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e02a1c33f10a0ed3aba855ab8ae2b6c4c5be8012"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ee41f4f3ccf8cd6ba3732e867abbec7e6d8d12e5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f3a8a7c1aa278f2378b2f3a10500c6674dffdfda"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net: nfc: fix deadlock between nfc_unregister_device and rfkill_fop_write", "id": "2429121", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2429121"}, "csaw": false, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: nfc: fix deadlock between nfc_unregister_device and rfkill_fop_write\nA deadlock can occur between nfc_unregister_device() and rfkill_fop_write()\ndue to lock ordering inversion between device_lock and rfkill_global_mutex.\nThe problematic lock order is:\nThread A (rfkill_fop_write):\nrfkill_fop_write()\nmutex_lock(&rfkill_global_mutex)\nrfkill_set_block()\nnfc_rfkill_set_block()\nnfc_dev_down()\ndevice_lock(&dev->dev) <- waits for device_lock\nThread B (nfc_unregister_device):\nnfc_unregister_device()\ndevice_lock(&dev->dev)\nrfkill_unregister()\nmutex_lock(&rfkill_global_mutex) <- waits for rfkill_global_mutex\nThis creates a classic ABBA deadlock scenario.\nFix this by moving rfkill_unregister() and rfkill_destroy() outside the\ndevice_lock critical section. Store the rfkill pointer in a local variable\nbefore releasing the lock, then call rfkill_unregister() after releasing\ndevice_lock.\nThis change is safe because rfkill_fop_write() holds rfkill_global_mutex\nwhile calling the rfkill callbacks, and rfkill_unregister() also acquires\nrfkill_global_mutex before cleanup. Therefore, rfkill_unregister() will\nwait for any ongoing callback to complete before proceeding, and\ndevice_del() is only called after rfkill_unregister() returns, preventing\nany use-after-free.\nThe similar lock ordering in nfc_register_device() (device_lock ->\nrfkill_global_mutex via rfkill_register) is safe because during\nregistration the device is not yet in rfkill_list, so no concurrent\nrfkill operations can occur on this device."], "name": "CVE-2025-71079", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-01-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-71079\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-71079\nhttps://lore.kernel.org/linux-cve-announce/2026011338-CVE-2025-71079-9f24@gregkh/T"]}

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