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CVE-2026-98771: 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: usb: storage: sierra_ms: reject short SWoC info transfers sierra_get_swoc_info() requests sizeof(struct swoc_info) (60) bytes from the device via usb_control_msg(), but its callers only treat a negative return value as failure. A device that answers the vendor-specific GetSwocInfo request with a short IN transfer is therefore accepted, leaving the tail of the freshly allocated (kmalloc(), non-zeroing) swoc_info buffer uninitialized. truinst_show() subsequently prints swocInfo->rev, swocInfo->LinuxSKU and swocInfo->LinuxVer from that buffer into the world-readable (0444) "truinst" sysfs attribute. An emulated/malicious USB device (VID 0x1199, PID 0x0fff) can exploit this to disclose up to 5 bytes of stale kernel heap memory (kmalloc-64) to unprivileged userspace, once per sysfs read, indefinitely. On kernels built without init_on_alloc this leaks recently freed heap contents. Only accept the transfer when the full structure was received. sierra_ms_init() already retries failed queries, so well-behaved devices are unaffected.

    Засегнати продукти

    • Linux Linux: 32fe5e393455d87db4988af03915634304870fb4 преди 353ca2623104a3baf5642c3ea31569df04ce4aaf; 32fe5e393455d87db4988af03915634304870fb4 преди 799810166646bcf9dc5a4e77bc4b0bdf6bc443f2; 32fe5e393455d87db4988af03915634304870fb4 преди 411da2ec8c62bfa39407e5a20d659b973b3cf311; 32fe5e393455d87db4988af03915634304870fb4 преди 4faaad69f18332246bbd4ca41718beb2a305bb72; 32fe5e393455d87db4988af03915634304870fb4 преди c85e8331d298b8f1dee8fe63718e76435cec7133; 32fe5e393455d87db4988af03915634304870fb4 преди e2d62928f2666a2964a23b1d39e6e762f0628d7b; 32fe5e393455d87db4988af03915634304870fb4 преди db9d3be156baca6ef80ae5d93acfeb85c61a74dd; 32fe5e393455d87db4988af03915634304870fb4 преди 8a0200d14acd9db388b85cd016e68a4e60d900ec
    • Linux Linux: 2.6.27; преди 2.6.27; 5.10.273 до 5.10.*; 5.15.224 до 5.15.*; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.113 до 6.12.*; 6.18.56 до 6.18.*; 7.2.10 до 7.2.*; от 7.3 нататък

    История

    • 18 октомври 2026 Публикувано

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    Първоизточници

    CVE-2026-98771: Linux | freedomonline.bg