Към съдържанието
Търсене

CVE-2026-90193: Linux

Няма оценка

CVSS

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: mailbox: qcom-cpucp: fix PREEMPT_RT self-deadlock in IRQ handler qcom_cpucp_mbox_irq_fn() calls mbox_chan_received_data() while holding chan->lock. Under PREEMPT_RT, spin_lock_irqsave() is converted to an rt_spinlock (rtmutex-based), which tracks ownership and can sleep. The callback chain triggered by mbox_chan_received_data() eventually reaches mailbox_clear_channel() -> mbox_send_message() -> add_to_rbuf(), which attempts to re-acquire the same chan->lock. Since rtmutex detects the re-entrant lock attempt by the same owner, the thread blocks waiting for a lock it already holds, causing a permanent deadlock. This deadlock manifests as 'irq/N-apss_cpucp_mbox' stuck in D state with the following call trace: rt_spin_lock -> mbox_send_message -> mailbox_clear_channel -> scmi_rx_callback -> mbox_chan_received_data [<- held chan->lock here] Fix by saving chan->cl locally and clearing the HW interrupt register inside the lock, then invoking mbox_chan_received_data() after releasing the lock. This preserves the mutual exclusion for chan->cl access while avoiding the lock re-entrancy that causes the PREEMPT_RT deadlock.

    Засегнати продукти

    • Linux Linux: 0e2a9a03106cd5fa0dbc9047675e7645c55e2669 преди aa482273f32117c3adeba9b1cc945e0b5d33722d; 0e2a9a03106cd5fa0dbc9047675e7645c55e2669 преди 8b8de6400c86937ed57d680d06d716e167b381de; 0e2a9a03106cd5fa0dbc9047675e7645c55e2669 преди e40b3edeaf25cd09e9c88edb1ef99373ca37593b; 0e2a9a03106cd5fa0dbc9047675e7645c55e2669 преди 3690aaa6d18f6775c3e7932fb8af8c5bf6a6b69c
    • Linux Linux: 6.11; преди 6.11; 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-2026-90193: Linux | freedomonline.bg