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CVE-2026-64014: 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: Input: usbtouchscreen - clamp NEXIO data_len/x_len to URB buffer size nexio_read_data() pulls data_len and x_len from a packed __be16 header in the device's interrupt packet and then walks packet->data[0..x_len) and packet->data[x_len..data_len) comparing each byte against a threshold. Both fields are 16-bit on the wire (max 65535). The existing adjustments shave at most 0x100 / 0x80 off, so the loop bound can still reach roughly 0xfeff. The URB transfer buffer for NEXIO is rept_size (1024) bytes from usb_alloc_coherent(), with the first 7 occupied by the packed header — so packet->data[] has 1017 valid bytes. read_data() callbacks are not given urb->actual_length, and nothing else bounds the walk. A device that lies about its length can get a ~64 KiB out-of-bounds read past the coherent DMA allocation. The first index whose byte exceeds NEXIO_THRESHOLD lands in begin_x / begin_y and from there into the reported touch coordinates, so adjacent kernel memory contents leak to userspace as ABS_X / ABS_Y events. Far enough out, the read can also hit an unmapped page and fault. Fix this all by clamping data_len to the buffer's data[] capacity and x_len to data_len.

    Засегнати продукти

    • Linux Linux: 5197424cdcccd2b0b1922babb93969b2515c43ce преди 45c829e5eb3b974282bae50b7cca2cc891f74f0b; 5197424cdcccd2b0b1922babb93969b2515c43ce преди e7cdcb266ba06d8480809b78ab8bb2bf8ff51ccb; 5197424cdcccd2b0b1922babb93969b2515c43ce преди 95f47331dfde243f93e679ce70bd0c24b37c683d; 5197424cdcccd2b0b1922babb93969b2515c43ce преди d883312061ccde8c536595998aaf687ec070077c; 5197424cdcccd2b0b1922babb93969b2515c43ce преди 103d2de9f505f56da173e43f12dba62f92620278; 5197424cdcccd2b0b1922babb93969b2515c43ce преди 0ca809ea8e0355299266c46e5f1755040aa8dcf3; 5197424cdcccd2b0b1922babb93969b2515c43ce преди 7585b6aa55d8ac85ad22f522e1059f93507727b6; 5197424cdcccd2b0b1922babb93969b2515c43ce преди 2905281cbda52ec9df540113b35b835feb5fafd3
    • Linux Linux: 2.6.34; преди 2.6.34; 5.10.259 до 5.10.*; 5.15.210 до 5.15.*; 6.1.176 до 6.1.*; 6.6.143 до 6.6.*; 6.12.93 до 6.12.*; 6.18.35 до 6.18.*; 7.0.12 до 7.0.*; от 7.1 нататък

    История

    • 19 юли 2026 Публикувано

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    Първоизточници

    CVE-2026-64014: Linux | freedomonline.bg