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CVE-2026-90044: Linux

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

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: gadget: f_fs: Fix Use-After-Free in AIO error path In ffs_epfile_write_iter() and ffs_epfile_read_iter(), when ffs_epfile_io() fails with an error other than -EIOCBQUEUED, the io_data structure (`p`) is freed. However, for AIO operations, the kiocb cancel function was already armed and kiocb->private was set to `p`. If a concurrent cancel operation (such as sys_io_cancel()) executes after ffs_epfile_io() fails but before the function frees `p`, a Use-After-Free can occur when the cancellation handler accesses the freed pointer. To securely fix this race condition, we must properly un-arm the cancellation. Invoking `kiocb->ki_complete()` does exactly this by acquiring `ctx->ctx_lock` and safely removing the kiocb from the active sequence. In doing so, it ensures that a parallel io_cancel can no longer discover the kiocb, effectively closing the race window. We then return -EIOCBQUEUED to notify the VFS layer that the kiocb has been consumed and it should avoid attempting to complete the request again or triggering subsequent completion handlers.

    Засегнати продукти

    • Linux Linux: de2080d41b5d584205e408d72021f0f335a046fc преди 922a29e1f8573fd405eea1a73a52112c4e7fcfc4; de2080d41b5d584205e408d72021f0f335a046fc преди 0a2f71ccf9c2053de725e9a7922d081f3f3a3804; de2080d41b5d584205e408d72021f0f335a046fc преди b5f0e80a03e87bd932487e03248eae3ba3ed7b45; de2080d41b5d584205e408d72021f0f335a046fc преди 153b5ecd29ed055562400bc17c91df3fd869b0ce; de2080d41b5d584205e408d72021f0f335a046fc преди 4a2fb2d12b87b43724230abb52a1440617c7b6cc; de2080d41b5d584205e408d72021f0f335a046fc преди e78dcb1f7ec271449c54984dc90c62a5ba272de7
    • Linux Linux: 4.0; преди 4.0; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.111 до 6.12.*; 6.18.51 до 6.18.*; 7.2.5 до 7.2.*; от 7.3 нататък

    История

    • 16 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-90044: Linux | freedomonline.bg