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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: synaptics-rmi4 - bound the F30 keymap to the GPIO/LED count\n\nrmi_f30_map_gpios() allocates gpioled_key_map with\nmin(gpioled_count, TRACKSTICK_RANGE_END) == at most 6 entries, but\nrmi_f30_attention() iterates the full f30-\u003egpioled_count (device query\nregister, range 0..31) and dereferences gpioled_key_map[i], and\ninput-\u003ekeycodemax is set to the full gpioled_count while input-\u003ekeycode\npoints at the 6-entry allocation.\n\nA device that reports gpioled_count \u003e 6 with GPIO support enabled\ntherefore causes an out-of-bounds read on the attention interrupt and\nout-of-bounds read/write through the EVIOCGKEYCODE/EVIOCSKEYCODE ioctls,\nwhich bound the index only against keycodemax. This is the same defect\nas the F3A handler, which was copied from F30.\n\nSize the keymap for the full gpioled_count; the mapping loop still\nassigns only the first min(gpioled_count, TRACKSTICK_RANGE_END) entries."
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              "value": "AV:L - An unprivileged local process that can open the affected /dev/input/event node can reach the flawed table through EVIOCGKEYCODE or EVIOCSKEYCODE; no physical reattachment or network path is required on systems with an affected F30 device.\nAC:L - Once an F30 device reports more than six GPIO/LEDs, attacker-selected indices deterministically trigger two-byte heap out-of-bounds reads or writes. No race or condition outside the attacker\u0027s control is required.\nPR:L - The evdev ioctl path contains no capability or namespace privilege check, so any ordinary user permitted to open the event node can trigger it.\nUI:N - The attacker directly issues the ioctls, and the separate attention path is device-driven; neither requires action by another user.\nS:U - The vulnerable driver and the affected kernel memory share the same security authority. Kernel privilege escalation or code execution does not itself cross a VM, IOMMU, or other scope boundary.\nC:H - EVIOCGKEYCODE returns attacker-selected out-of-bounds u16 values and can disclose multiple adjacent slab words across the available indices. This heap disclosure can expose security-sensitive kernel data and facilitate further exploitation.\nI:H - EVIOCSKEYCODE performs attacker-controlled u16 writes beyond the allocation at selectable offsets. These writes can corrupt adjacent heap objects or metadata and plausibly enable control-flow hijacking.\nA:H - The controlled heap corruption can damage adjacent kernel objects and cause an oops or panic, while the device can also repeatedly trigger the out-of-bounds attention path."
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "title": "Input: synaptics-rmi4 - bound the F30 keymap to the GPIO/LED count",
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    "dateReserved": "2026-07-19T15:36:31.776Z",
    "dateUpdated": "2026-08-17T04:52:31.046Z",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: synaptics-rmi4 - bound the F3A keymap to the GPIO count\n\nrmi_f3a_initialize() takes the GPIO count from the device query register\n(f3a-\u003egpio_count = buf \u0026 RMI_F3A_GPIO_COUNT, range 0..127).\nrmi_f3a_map_gpios() then allocates gpio_key_map with\nmin(gpio_count, TRACKSTICK_RANGE_END) == at most 6 entries, but\nrmi_f3a_attention() iterates the full gpio_count and dereferences\ngpio_key_map[i], and input-\u003ekeycodemax is set to the full gpio_count\nwhile input-\u003ekeycode points at the 6-entry allocation.\n\nA device that reports gpio_count \u003e 6 therefore causes an out-of-bounds\nread of gpio_key_map[] on every attention interrupt, and out-of-bounds\naccesses through the input core\u0027s default keymap ioctls: EVIOCGKEYCODE\nreads past the buffer (leaking adjacent slab memory to user space) and\nEVIOCSKEYCODE writes a caller-controlled value past it, for any process\nable to open the evdev node, since input_default_getkeycode() and\ninput_default_setkeycode() only bound the index against keycodemax.\n\nSize the keymap for the full gpio_count. The mapping loop is unchanged:\nit still assigns only the first min(gpio_count, TRACKSTICK_RANGE_END)\nentries; the remaining slots stay KEY_RESERVED (devm_kcalloc zero-fills)\nand are skipped when reporting."
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            {
              "lang": "en",
              "value": "AV:L - The highest-severity defensible path is local: a process that can open the affected RMI touchpad\u0027s evdev node can invoke the vulnerable keymap ioctls. A malicious USB RMI device is also a physical trigger, but the local ioctl path is more severe.\nAC:L - On a vulnerable device reporting more than six GPIOs, selecting any keymap index from 6 through gpio_count-1 deterministically accesses beyond the allocation. No race or condition outside the attacker\u0027s control is required.\nPR:L - The evdev keymap ioctl path has no capability or authentication check; only ordinary device-node access controls apply. An unprivileged user with seat, ACL, or input-device access can exploit it without administrative capabilities.\nUI:N - The attacker directly issues EVIOCGKEYCODE or EVIOCSKEYCODE after opening the node. No action by another user is required.\nS:U - Exploitation compromises the host kernel within the same security authority. It does not inherently cross a VM, IOMMU, or other separate security boundary.\nC:H - EVIOCGKEYCODE can disclose successive 16-bit words across as much as 242 bytes beyond the six-entry keymap, exposing adjacent slab contents and potentially kernel pointers. The accompanying corruption can also support stronger disclosure primitives.\nI:H - EVIOCSKEYCODE provides indexed, caller-controlled 16-bit writes throughout the out-of-bounds range. This heap corruption can overwrite adjacent pointers or control data and plausibly enable kernel code execution.\nA:H - The controlled heap overwrite can corrupt adjacent slab objects and cause a kernel oops or panic, while device attention interrupts repeatedly exercise the out-of-bounds read. The failure can be triggered repeatedly without victim interaction."
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  "dataVersion": "5.2"
}