CVE-2025-71079

{"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": "2026-11-10T12:38:49.430Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T16:03:06.740Z"}, "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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{"url": "https://git.kernel.org/stable/c/6b93c8ab6f6cda8818983a4ae3fcf84b023037b4"}, {"url": "https://git.kernel.org/stable/c/8fc4632fb508432895430cd02b38086bdd649083"}, {"url": "https://git.kernel.org/stable/c/f3a8a7c1aa278f2378b2f3a10500c6674dffdfda"}, {"url": "https://git.kernel.org/stable/c/1ab526d97a57e44d26fadcc0e9adeb9c0c0182f5"}], "title": "net: nfc: fix deadlock between nfc_unregister_device and rfkill_fop_write", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"x_adpType": "supplier", "providerMetadata": {"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-11-10T12:38:49.430Z"}, "affected": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "versions": 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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."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: nfc: corrige interbloqueo entre nfc_unregister_device y rfkill_fop_write\n\nPuede ocurrir un interbloqueo entre nfc_unregister_device() y rfkill_fop_write() debido a la inversi\u00f3n del orden de bloqueo entre device_lock y rfkill_global_mutex.\n\nEl orden de bloqueo problem\u00e1tico es:\n\nHilo A (rfkill_fop_write):\n rfkill_fop_write()\n mutex_lock(&amp;rfkill_global_mutex)\n rfkill_set_block()\n nfc_rfkill_set_block()\n nfc_dev_down()\n device_lock(&amp;dev-&gt;dev) &lt;- espera por device_lock\n\nHilo B (nfc_unregister_device):\n nfc_unregister_device()\n device_lock(&amp;dev-&gt;dev)\n rfkill_unregister()\n mutex_lock(&amp;rfkill_global_mutex) &lt;- espera por rfkill_global_mutex\n\nEsto crea un escenario cl\u00e1sico de interbloqueo ABBA.\n\nSoluciona esto moviendo rfkill_unregister() y rfkill_destroy() fuera de la secci\u00f3n cr\u00edtica de device_lock. Almacena el puntero rfkill en una variable local antes de liberar el bloqueo, luego llama a rfkill_unregister() despu\u00e9s de liberar device_lock.\n\nEste cambio es seguro porque rfkill_fop_write() mantiene rfkill_global_mutex mientras llama a las retrollamadas de rfkill, y rfkill_unregister() tambi\u00e9n adquiere rfkill_global_mutex antes de la limpieza. Por lo tanto, rfkill_unregister() esperar\u00e1 a que cualquier retrollamada en curso se complete antes de continuar, y device_del() solo se llama despu\u00e9s de que rfkill_unregister() retorna, previniendo cualquier uso despu\u00e9s de liberaci\u00f3n.\n\nEl orden de bloqueo similar en nfc_register_device() (device_lock -&gt; rfkill_global_mutex a trav\u00e9s de rfkill_register) es seguro porque durante el registro el dispositivo a\u00fan no est\u00e1 en rfkill_list, por lo que no pueden ocurrir operaciones rfkill concurrentes en este dispositivo."}], "id": "CVE-2025-71079", "lastModified": "2026-11-10T13:18:03.490", "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"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "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"]}

{}