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CVE-2026-43468: 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: net/mlx5: Fix deadlock between devlink lock and esw->wq esw->work_queue executes esw_functions_changed_event_handler -> esw_vfs_changed_event_handler and acquires the devlink lock. .eswitch_mode_set (acquires devlink lock in devlink_nl_pre_doit) -> mlx5_devlink_eswitch_mode_set -> mlx5_eswitch_disable_locked -> mlx5_eswitch_event_handler_unregister -> flush_workqueue deadlocks when esw_vfs_changed_event_handler executes. Fix that by no longer flushing the work to avoid the deadlock, and using a generation counter to keep track of work relevance. This avoids an old handler manipulating an esw that has undergone one or more mode changes: - the counter is incremented in mlx5_eswitch_event_handler_unregister. - the counter is read and passed to the ephemeral mlx5_host_work struct. - the work handler takes the devlink lock and bails out if the current generation is different than the one it was scheduled to operate on. - mlx5_eswitch_cleanup does the final draining before destroying the wq. No longer flushing the workqueue has the side effect of maybe no longer cancelling pending vport_change_handler work items, but that's ok since those are disabled elsewhere: - mlx5_eswitch_disable_locked disables the vport eq notifier. - mlx5_esw_vport_disable disarms the HW EQ notification and marks vport->enabled under state_lock to false to prevent pending vport handler from doing anything. - mlx5_eswitch_cleanup destroys the workqueue and makes sure all events are disabled/finished.

    Засегнати продукти

    • Linux Linux: f1bc646c9a06f09aad5d8bacb87103b5573ee45e преди 0de867f6e34eae6907b367fd152c55e61cb98608; f1bc646c9a06f09aad5d8bacb87103b5573ee45e преди 957d2a58f7f8ebcbdd0a85935e0d2675134b890d; f1bc646c9a06f09aad5d8bacb87103b5573ee45e преди 3c7313cb41b1b427078440364d2f042c276a1c0b; f1bc646c9a06f09aad5d8bacb87103b5573ee45e преди 4a7838bebc38374f74baaf88bf2cf8d439a92923; f1bc646c9a06f09aad5d8bacb87103b5573ee45e преди 90e7e5d14d0bd25ffd019a3aa39d9f1c05fedbe1; f1bc646c9a06f09aad5d8bacb87103b5573ee45e преди aed763abf0e905b4b8d747d1ba9e172961572f57
    • Linux Linux: 6.0; преди 6.0; 6.1.167 до 6.1.*; 6.6.130 до 6.6.*; 6.12.78 до 6.12.*; 6.18.19 до 6.18.*; 6.19.9 до 6.19.*; 7.0 до *

    История

    • 8 май 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-43468: Linux | freedomonline.bg