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CVE-2026-72483: 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: host: max3421: Fix shift-out-of-bounds in max3421_hub_control() The `max3421_hub_control()` function handles USB hub class requests to the virtual root hub. In the `default` branches of both the `ClearPortFeature` and `SetPortFeature` switch statements, it modifies `max3421_hcd->port_status` by left shifting 1 by the request's `value` parameter. However, it does not validate whether this shift will exceed the width of `port_status`. So if a malicious userspace task with access to the root hub via /dev/bus/usb/.../001 issues a USBDEVFS_CONTROL ioctl with `wValue` greater than or equal to 32, the left shift operation invokes shift-out-of-bounds undefined behavior. This results in arbitrary bit corruption of `port_status`, including the normally-immutable change bits, which can bypass internal state checks and confuse the hub status. Fix this by rejecting requests whose `value` exceeds the shift width before performing the shift. This issue was found using a KLEE-based symbolic execution tool for kernel drivers that I'm currently developing.

    Засегнати продукти

    • Linux Linux: 2d53139f31626bad6f8983d8e519ddde2cbba921 преди e5fa9d8f40746ec3447335c9642c03410f5fd3af; 2d53139f31626bad6f8983d8e519ddde2cbba921 преди 08b1d4cab0230697bc74c63fc4e40170a7559c54; 2d53139f31626bad6f8983d8e519ddde2cbba921 преди 3be5f24e8270ba53b3c814d13689bb8644c86237; 2d53139f31626bad6f8983d8e519ddde2cbba921 преди d512bdefd241b98f4d7bcb5bab5614a86411fad4; 2d53139f31626bad6f8983d8e519ddde2cbba921 преди 00dd025324b56d39d37e57a08f473dab3a660f30; 2d53139f31626bad6f8983d8e519ddde2cbba921 преди 02d03c61e8a7b016956acb48e8a2512d16d87517; 2d53139f31626bad6f8983d8e519ddde2cbba921 преди 4da073d57176d8e1c2bca34febfbc81d2560c1a5; 2d53139f31626bad6f8983d8e519ddde2cbba921 преди cff06b03b530ae1fe8a13e93a7848f2130e00fb4
    • Linux Linux: 3.16; преди 3.16; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; от 7.2 нататък

    История

    • 15 август 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-72483: Linux | freedomonline.bg