{"id":"CVE-2026-64014","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nInput: usbtouchscreen - clamp NEXIO data_len/x_len to URB buffer size\n\nnexio_read_data() pulls data_len and x_len from a packed __be16 header\nin the device's interrupt …","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nInput: usbtouchscreen - clamp NEXIO data_len/x_len to URB buffer size\n\nnexio_read_data() pulls data_len and x_len from a packed __be16 header\nin the device's interrupt …","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","cwe":["CWE-125"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 2.6.34, < 5.10.259","linux_kernel >= 5.11, < 5.15.210","linux_kernel >= 5.16, < 6.1.176","linux_kernel >= 6.2, < 6.6.143","linux_kernel >= 6.7, < 6.12.93","linux_kernel >= 6.13, < 6.18.35","linux_kernel >= 6.19, < 7.0.12","linux_kernel = 7.1"],"patched":["linux_kernel 7.0.12"],"published":"2026-07-19","updated":"2026-10-13","sourceUpdated":"2026-10-13T14:46:00.563","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-64014","references":[{"url":"https://git.kernel.org/stable/c/0ca809ea8e0355299266c46e5f1755040aa8dcf3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/103d2de9f505f56da173e43f12dba62f92620278","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2905281cbda52ec9df540113b35b835feb5fafd3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/45c829e5eb3b974282bae50b7cca2cc891f74f0b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7585b6aa55d8ac85ad22f522e1059f93507727b6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/95f47331dfde243f93e679ce70bd0c24b37c683d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d883312061ccde8c536595998aaf687ec070077c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e7cdcb266ba06d8480809b78ab8bb2bf8ff51ccb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.0022,"epssPercentile":0.11555,"ingestedAt":"2026-10-13T15:33:40.021Z","slug":"CVE-2026-64014","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nInput: usbtouchscreen - clamp NEXIO data_len/x_len to URB buffer size\n\nnexio_read_data() pulls data_len and x_len from a packed __be16 header\nin the device's interrupt packet and then walks packet->data[0..x_len)\nand packet->data[x_len..data_len) comparing each byte against a\nthreshold.\n\nBoth fields are 16-bit on the wire (max 65535).  The existing\nadjustments shave at most 0x100 / 0x80 off, so the loop bound can still\nreach roughly 0xfeff.  The URB transfer buffer for NEXIO is rept_size\n(1024) bytes from usb_alloc_coherent(), with the first 7 occupied by the\npacked header — so packet->data[] has 1017 valid bytes.  read_data()\ncallbacks are not given urb->actual_length, and nothing else bounds the\nwalk.\n\nA device that lies about its length can get a ~64 KiB out-of-bounds read\npast the coherent DMA allocation.  The first index whose byte exceeds\nNEXIO_THRESHOLD lands in begin_x / begin_y and from there into the\nreported touch coordinates, so adjacent kernel memory contents leak to\nuserspace as ABS_X / ABS_Y events.  Far enough out, the read can also\nhit an unmapped page and fault.\n\nFix this all by clamping data_len to the buffer's data[] capacity and\nx_len to data_len.\n\n## Affected\n\n- `linux_kernel >= 2.6.34, < 5.10.259`\n- `linux_kernel >= 5.11, < 5.15.210`\n- `linux_kernel >= 5.16, < 6.1.176`\n- `linux_kernel >= 6.2, < 6.6.143`\n- `linux_kernel >= 6.7, < 6.12.93`\n- `linux_kernel >= 6.13, < 6.18.35`\n- `linux_kernel >= 6.19, < 7.0.12`\n- `linux_kernel = 7.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.0.12`","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}