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CVE-2025-71079: Linux

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: net: nfc: fix deadlock between nfc_unregister_device and rfkill_fop_write A deadlock can occur between nfc_unregister_device() and rfkill_fop_write() due to lock ordering inversion between device_lock and rfkill_global_mutex. The problematic lock order is: Thread A (rfkill_fop_write): rfkill_fop_write() mutex_lock(&rfkill_global_mutex) rfkill_set_block() nfc_rfkill_set_block() nfc_dev_down() device_lock(&dev->dev) <- waits for device_lock Thread B (nfc_unregister_device): nfc_unregister_device() device_lock(&dev->dev) rfkill_unregister() mutex_lock(&rfkill_global_mutex) <- waits for rfkill_global_mutex This creates a classic ABBA deadlock scenario. Fix this by moving rfkill_unregister() and rfkill_destroy() outside the device_lock critical section. Store the rfkill pointer in a local variable before releasing the lock, then call rfkill_unregister() after releasing device_lock. This change is safe because rfkill_fop_write() holds rfkill_global_mutex while calling the rfkill callbacks, and rfkill_unregister() also acquires rfkill_global_mutex before cleanup. Therefore, rfkill_unregister() will wait for any ongoing callback to complete before proceeding, and device_del() is only called after rfkill_unregister() returns, preventing any use-after-free. The similar lock ordering in nfc_register_device() (device_lock -> rfkill_global_mutex via rfkill_register) is safe because during registration the device is not yet in rfkill_list, so no concurrent rfkill operations can occur on this device.

    Засегнати продукти

    • Linux Linux: 73a0d12114b4bc1a9def79a623264754b9df698e преди 2e0831e9fc46a06daa6d4d8d57a2738e343130c3; 8a9c61c3ef187d8891225f9b932390670a43a0d3 преди e02a1c33f10a0ed3aba855ab8ae2b6c4c5be8012; 3e3b5dfcd16a3e254aab61bd1e8c417dd4503102 преди ee41f4f3ccf8cd6ba3732e867abbec7e6d8d12e5; 3e3b5dfcd16a3e254aab61bd1e8c417dd4503102 преди 6b93c8ab6f6cda8818983a4ae3fcf84b023037b4; 3e3b5dfcd16a3e254aab61bd1e8c417dd4503102 преди 8fc4632fb508432895430cd02b38086bdd649083; 3e3b5dfcd16a3e254aab61bd1e8c417dd4503102 преди f3a8a7c1aa278f2378b2f3a10500c6674dffdfda; 3e3b5dfcd16a3e254aab61bd1e8c417dd4503102 преди 1ab526d97a57e44d26fadcc0e9adeb9c0c0182f5; 5ef16d2d172ee56714cff37cd005b98aba08ef5a; ff169909eac9e00bf1aa0af739ba6ddfb1b1d135; 47244ac0b65bd74cc70007d8e1bac68bd2baad19; c45cea83e13699bdfd47842e04d09dd43af4c371; 307d2e6cebfca9d92f86c8e2c8e3dd4a8be46ba6; 5.10.82 преди 5.10.248; 5.15.5 преди 5.15.198; 4.4.293 преди 4.5; 4.9.291 преди 4.10; 4.14.256 преди 4.15; 4.19.218 преди 4.20; 5.4.162 преди 5.5
    • Linux Linux: 5.16; преди 5.16; 5.10.248 до 5.10.*; 5.15.198 до 5.15.*; 6.1.160 до 6.1.*; 6.6.120 до 6.6.*; 6.12.64 до 6.12.*; 6.18.4 до 6.18.*; 6.19 до *
    • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP: V3.1.6 преди *
    • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP: V3.1.6 преди *
    • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP: V3.1.6 преди *

    История

    • 13 януари 2026 Публикувано

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    Първоизточници

    CVE-2025-71079: Linux | freedomonline.bg