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CVE-2026-90400: 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: md: recheck spare changes before starting sync remove_spares() and remove_and_add_spares() modify the array's rdev configuration. These operations are only safe after the array has been suspended. md_start_sync() checks whether spare configuration changes are needed before taking reconfig_mutex. However, the rdev state can change before the mutex is acquired, so the initial check can become stale. In that case, md_choose_sync_action() may remove or replace rdevs while normal I/O is still accessing them. The race can occur as follows: raid10d Worker Normal IO ____________ _______________________ ______________________ raid10_write_request() wait_blocked_dev() set Blocked set Faulty Skip Faulty rdev rrdev->nr_pending++ .repl_bio = bio removeable_rdev = false . array not suspended . lock mddev goto err_handle lock mddev (wait) . update sb . clear Blocked . . unlock mddev . lock mddev (acquires) remove_spares() removeable_rdev = true raid10_remove_disk() rdev = replacement replacement = NULL rdev_dec_pending(NULL) unlock mddev (NULL)->nr_pending-- In this case, rdev_dec_pending() is called with a NULL pointer, resulting in a NULL pointer dereference when attempting to decrement nr_pending. Fix this by suspending the array when spare configuration changes are needed, including for non-read-write arrays, and checking aga

    Засегнати продукти

    • Linux Linux: bc08041b32abe6c9824f78735bac22018eabfc06 преди c3777d16bc3335c0ac4bdad0551c80d38c5d94cc; bc08041b32abe6c9824f78735bac22018eabfc06 преди e5ac7ab78467b064f1da8b0f3042a63595fafcfd; bc08041b32abe6c9824f78735bac22018eabfc06 преди 81b39df5d701976cf20e52f33106c1fc1603b4cb; bc08041b32abe6c9824f78735bac22018eabfc06 преди c7d34d17ea43ebc86b45d439ebb435e11ca44bca
    • Linux Linux: 6.7; преди 6.7; 6.12.110 до 6.12.*; 6.18.52 до 6.18.*; 7.2.6 до 7.2.*; от 7.3 нататък

    История

    • 17 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-90400: Linux | freedomonline.bg