CVE-2025-39960 (GCVE-0-2025-39960)

Vulnerability from cvelistv5 – Published: 2025-10-09 12:13 – Updated: 2026-08-05 12:06
VLAI
Title
gpiolib: acpi: initialize acpi_gpio_info struct
Summary
In the Linux kernel, the following vulnerability has been resolved: gpiolib: acpi: initialize acpi_gpio_info struct Since commit 7c010d463372 ("gpiolib: acpi: Make sure we fill struct acpi_gpio_info"), uninitialized acpi_gpio_info struct are passed to __acpi_find_gpio() and later in the call stack info->quirks is used in acpi_populate_gpio_lookup. This breaks the i2c_hid_cpi driver: [ 58.122916] i2c_hid_acpi i2c-UNIW0001:00: HID over i2c has not been provided an Int IRQ [ 58.123097] i2c_hid_acpi i2c-UNIW0001:00: probe with driver i2c_hid_acpi failed with error -22 Fix this by initializing the acpi_gpio_info pass to __acpi_find_gpio()
Severity
7.3 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 7c010d463372140006bf96985a306d6cbfc6e118 , < 27d94a2a52cbb54927c0140bd5b978c56e9a283a (git)
Affected: 7c010d463372140006bf96985a306d6cbfc6e118 , < 19c839a98c731169f06d32e7c9e00c78a0086ebe (git)
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Linux Linux Affected: 6.16
Unaffected: 0 , < 6.16 (semver)
Unaffected: 6.16.9 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
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          "programFiles": [
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            "version": "3.1"
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              "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."
            }
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    "datePublished": "2025-10-09T12:13:21.327Z",
    "dateReserved": "2025-04-16T07:20:57.149Z",
    "dateUpdated": "2026-08-05T12:06:28.916Z",
    "state": "PUBLISHED"
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      "cve": "CVE-2025-39960",
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      "cve": "CVE-2025-39960",
      "id": "CVE-2025-39960",
      "initial_release_date": "2025-10-09T23:23:05Z",
      "product_status:known_not_affected": "523",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-39960",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-39960.json",
      "version": "8"
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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