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CVE-2026-43324: Linux

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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Атакува се

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Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: USB: dummy-hcd: Fix interrupt synchronization error This fixes an error in synchronization in the dummy-hcd driver. The error has a somewhat involved history. The synchronization mechanism was introduced by commit 7dbd8f4cabd9 ("USB: dummy-hcd: Fix erroneous synchronization change"), which added an emulated "interrupts enabled" flag together with code emulating synchronize_irq() (it waits until all current handler callbacks have returned). But the emulated interrupt-disable occurred too late, after the driver containing the handler callback routines had been told that it was unbound and no more callbacks would occur. Commit 4a5d797a9f9c ("usb: gadget: dummy_hcd: fix gpf in gadget_setup") tried to fix this by moving the synchronize_irq() emulation code from dummy_stop() to dummy_pullup(), which runs before the unbind callback. There still were races, though, because the emulated interrupt-disable still occurred too late. It couldn't be moved to dummy_pullup(), because that routine can be called for reasons other than an impending unbind. Therefore commits 7dc0c55e9f30 ("USB: UDC core: Add udc_async_callbacks gadget op") and 04145a03db9d ("USB: UDC: Implement udc_async_callbacks in dummy-hcd") added an API allowing the UDC core to tell dummy-hcd exactly when emulated interrupts and their callbacks should be disabled. That brings us to the current state of things, which is still wrong because the emulated synchronize_irq() occurs before the emulated interrupt-disable! That's no good, beause it means that more emulated interrupts can occur after the synchronize_irq() emulation has run, leading to the possibility that a callback handler may be running when the gadget driver is unbound. To fix this, we have to move the synchronize_irq() emulation code yet again, to the dummy_udc_async_callbacks() routine, which takes care of enabling and disabling emulated interrupt requests. The synchronizat

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    • Linux Linux: 04145a03db9d78469e0817ab3a767c76c0fb0947 преди d847f375b1bcea713143bc02720d13d2d01b012a; 04145a03db9d78469e0817ab3a767c76c0fb0947 преди cbf7df5e5d27cd5bea92ee9a75a4b28dbcc718d4; 04145a03db9d78469e0817ab3a767c76c0fb0947 преди 5aa776c8615bea3b1eaeec87b0788375800ead4f; 04145a03db9d78469e0817ab3a767c76c0fb0947 преди 94d4fab1dd9e64f45449bcc7d6a5acf796b13015; 04145a03db9d78469e0817ab3a767c76c0fb0947 преди 5687a09776069bd915560021c9728ca528440128; 04145a03db9d78469e0817ab3a767c76c0fb0947 преди 8bcd80219d8e10e660bf29b20e41bb8beb4e4cb7; 04145a03db9d78469e0817ab3a767c76c0fb0947 преди 2ca9e46f8f1f5a297eb0ac83f79d35d5b3a02541
    • Linux Linux: 5.14; преди 5.14; 5.15.203 до 5.15.*; 6.1.168 до 6.1.*; 6.6.134 до 6.6.*; 6.12.81 до 6.12.*; 6.18.22 до 6.18.*; 6.19.12 до 6.19.*; 7.0 до *

    История

    • 8 май 2026 Публикувано

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    CVE-2026-43324: Linux | freedomonline.bg