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CVE-2026-23454: 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: mana: fix use-after-free in mana_hwc_destroy_channel() by reordering teardown A potential race condition exists in mana_hwc_destroy_channel() where hwc->caller_ctx is freed before the HWC's Completion Queue (CQ) and Event Queue (EQ) are destroyed. This allows an in-flight CQ interrupt handler to dereference freed memory, leading to a use-after-free or NULL pointer dereference in mana_hwc_handle_resp(). mana_smc_teardown_hwc() signals the hardware to stop but does not synchronize against IRQ handlers already executing on other CPUs. The IRQ synchronization only happens in mana_hwc_destroy_cq() via mana_gd_destroy_eq() -> mana_gd_deregister_irq(). Since this runs after kfree(hwc->caller_ctx), a concurrent mana_hwc_rx_event_handler() can dereference freed caller_ctx (and rxq->msg_buf) in mana_hwc_handle_resp(). Fix this by reordering teardown to reverse-of-creation order: destroy the TX/RX work queues and CQ/EQ before freeing hwc->caller_ctx. This ensures all in-flight interrupt handlers complete before the memory they access is freed.

    Засегнати продукти

    • Linux Linux: ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f преди b88edf12fc3779521ae5f6f1584153b15f7da6df; ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f преди e23bf444512cb85d76012080a76cd1f9e967448e; ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f преди 249e905571583a434d4ea8d6f92ccc0eef337115; ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f преди 2b001901f689021acd7bf2dceed74a1bdcaaa1f9; ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f преди afdb1533eb9c05432aeb793a7280fa827c502f5c; ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f преди 05d345719d85b927cba74afac4d5322de3aa4256; ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f преди fa103fc8f56954a60699a29215cb713448a39e87
    • Linux Linux: 5.13; преди 5.13; 5.15.203 до 5.15.*; 6.1.167 до 6.1.*; 6.6.130 до 6.6.*; 6.12.78 до 6.12.*; 6.18.20 до 6.18.*; 6.19.10 до 6.19.*; 7.0 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

    • 3 април 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-23454: Linux | freedomonline.bg