CVE-2025-39960

I2C-HID probe failure via uninitialized GPIO metadata

Published Oct 9, 2025 · Updated Oct 9, 2025

Improper initialization in Linux 6.16 allows local users to disrupt I2C-HID device probing through ACPI GPIO resolution. In gpiolib-acpi-core.c, an uninitialized acpi_gpio_info structure reaches __acpi_find_gpio(), and acpi_populate_gpio_lookup later reads its indeterminate quirks member. The published failure occurs during i2c_hid_acpi probing on systems with affected ACPI-backed hardware; no attacker-controlled input or broader consequence is documented.

CVSS severity7.3
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper initialization in Linux 6.16 allows local users to disrupt I2C-HID device probing through ACPI GPIO resolution. In gpiolib-acpi-core.c, an uninitialized acpi_gpio_info structure reaches __acpi_find_gpio(), and acpi_populate_gpio_lookup later reads its indeterminate quirks member. The published failure occurs during i2c_hid_acpi probing on systems with affected ACPI-backed hardware; no attacker-controlled input or broader consequence is documented.

The record

CVE
CVE-2025-39960
Published
Oct 9, 2025
Updated
Oct 9, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.16
  2. Affected versionversion=7c010d463372140006bf96985a306d6cbfc6e118 <19c839a98c731169f06d32e7c9e00c78a0086ebe
  3. Affected versionversion=7c010d463372140006bf96985a306d6cbfc6e118 <27d94a2a52cbb54927c0140bd5b978c56e9a283a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.16; version=7c010d463372140006bf96985a306d6cbfc6e118 <19c839a98c731169f06d32e7c9e00c78a0086ebe; version=7c010d463372140006bf96985a306d6cbfc6e118 <27d94a2a52cbb54927c0140bd5b978c56e9a283a

Published CVSS scores

7.3kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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