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CVE-2026-80866: Linux

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CVSS

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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: tipc: avoid busy looping in tipc_exit_net() Blamed commit introduced a busy-wait loop in tipc_exit_net() to wait for pending UDP bearer cleanup works to complete: while (atomic_read(&tn->wq_count)) cond_resched(); This loop can busy-wait for a long time if cond_resched() is a NOP. This typically happens if the netns exit is executed by a high priority task, or under kernels configured without preemption (CONFIG_PREEMPT_NONE). In such cases, it wastes CPU cycles and can lead to soft lockups. Fix this by replacing the busy loop with wait_var_event(), allowing the thread to sleep properly until the work queue count reaches zero. Accordingly, update cleanup_bearer() to use atomic_dec_and_test() and wake_up_var() to wake up the waiter when the count drops to zero. This uses the global wait queue hash table, avoiding the need to bloat struct tipc_net with a wait_queue_head_t. The atomic_dec_and_test() provides the necessary memory barrier to ensure the wakeup is not missed.

    Засегнати продукти

    • Linux Linux: 04c26faa51d1e2fe71cf13c45791f5174c37f986 преди 772769859226a5b004442403510acb58a1c32e72; 04c26faa51d1e2fe71cf13c45791f5174c37f986 преди 99b82c8452887408ea908fdfa5df33c4a5dfa88f; 04c26faa51d1e2fe71cf13c45791f5174c37f986 преди 110bb16d37bdba03213156c0df37e7119c190936; 04c26faa51d1e2fe71cf13c45791f5174c37f986 преди 7672973957e3e20780afe5937a9fec70b72bc060; 04c26faa51d1e2fe71cf13c45791f5174c37f986 преди 522d1d950b9e3b68190a6de7534827c8dccedb73; 04c26faa51d1e2fe71cf13c45791f5174c37f986 преди c1481c94e74c955e0448ddf46b8615a44d840c1e; d1f76dfadaf8f47ed1753f97dbcbd41c16215ffa; 5195ec5e365a2a9331bfeb585b613a6e94f98dba; b9f5b7ad4ac3af006443f535b1ce7bff1d130d7d; 5.4.124 преди 5.5; 5.10.42 преди 5.11; 5.12.9 преди 5.13
    • Linux Linux: 5.13; преди 5.13; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 6.18.57 до 6.18.*; 7.1.5 до 7.1.*; 7.2 до *

    История

    • 4 септември 2026 Публикувано

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    Първоизточници

    CVE-2026-80866: Linux | freedomonline.bg