{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpio/gpiolib-acpi-core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "27d94a2a52cbb54927c0140bd5b978c56e9a283a",
              "status": "affected",
              "version": "7c010d463372140006bf96985a306d6cbfc6e118",
              "versionType": "git"
            },
            {
              "lessThan": "19c839a98c731169f06d32e7c9e00c78a0086ebe",
              "status": "affected",
              "version": "7c010d463372140006bf96985a306d6cbfc6e118",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpio/gpiolib-acpi-core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16.9",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpiolib: acpi: initialize acpi_gpio_info struct\n\nSince commit 7c010d463372 (\"gpiolib: acpi: Make sure we fill struct\nacpi_gpio_info\"), uninitialized acpi_gpio_info struct are passed to\n__acpi_find_gpio() and later in the call stack info-\u003equirks is used in\nacpi_populate_gpio_lookup. This breaks the i2c_hid_cpi driver:\n\n[   58.122916] i2c_hid_acpi i2c-UNIW0001:00: HID over i2c has not been provided an Int IRQ\n[   58.123097] i2c_hid_acpi i2c-UNIW0001:00: probe with driver i2c_hid_acpi failed with error -22\n\nFix this by initializing the acpi_gpio_info pass to __acpi_find_gpio()"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable code is reached only through local device enumeration/driver probe (`gpiod_find_and_request()` \u2192 `acpi_find_gpio()`), triggered at boot, on ACPI hotplug, or via local sysfs driver bind/unbind. There is no network- or peer-supplied data on the path.\nAC:L - On affected ACPI firmware the misbehavior reproduces deterministically every probe (the reporter hit it on every boot), and an attacker able to trigger a re-probe can groom the kernel stack so the desired quirk bits land at the uninitialized `info.quirks` offset. No condition outside attacker influence is required.\nPR:L - Reaching a GPIO probe path requires a local account on the system; unprivileged users cannot obtain the ACPI/GPIO subsystem privileges through user namespaces, but the resulting misconfiguration is already present system-wide from boot and is observable/abusable by any local low-privileged user.\nUI:N - The uninitialized struct is consumed automatically during device probe and ACPI resource enumeration; no victim action such as opening a file or mounting a filesystem is needed.\nS:U - The impact stays within the kernel\u0027s own security authority \u2014 misconfigured GPIO descriptors and driver state \u2014 with no crossing of a VM, IOMMU, or sandbox boundary.\nC:L - The uninitialized `quirks` bits are never copied to userspace, but they determine which GPIO line is claimed and with which polarity/active-low flags, state that is observable through gpiochip line info, exposing a small amount of residual kernel stack content indirectly.\nI:H - With `ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER` spuriously set, `gpio_to_desc()` hands the driver a descriptor for an arbitrary global GPIO line on an unrelated controller, which the driver then configures and drives; combined with `NO_IO_RESTRICTION` discarding the firmware\u0027s declared direction, the kernel modifies hardware state (resets, power enables, relay/motor outputs on embedded, industrial, and automotive platforms) that it was never authorized to touch.\nA:H - The confirmed effect is device probe failure making hardware unusable (i2c_hid_acpi input device dead with -EINVAL), and driving an arbitrary unrelated GPIO \u2014 such as a reset or power-enable line \u2014 can reset or hang the platform outright."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:06:28.916Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/27d94a2a52cbb54927c0140bd5b978c56e9a283a"
        },
        {
          "url": "https://git.kernel.org/stable/c/19c839a98c731169f06d32e7c9e00c78a0086ebe"
        }
      ],
      "title": "gpiolib: acpi: initialize acpi_gpio_info struct",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39960",
    "datePublished": "2025-10-09T12:13:21.327Z",
    "dateReserved": "2025-04-16T07:20:57.149Z",
    "dateUpdated": "2026-08-05T12:06:28.916Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}