EUVD-2026-76538
GHSA-5r2j-h2g4-5h5v
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Local sysfs access is required to exploit the UAF; AC:H reflects the abnormal sysfs group creation failure condition needed to trigger the incomplete cleanup.
Primary rating from Vendor (Linux).
CVSS VectorVendor: Linux
Lifecycle Timeline
6DescriptionCVE.org
In the Linux kernel, the following vulnerability has been resolved:
HID: sensor: custom: Fix field sysfs group cleanup on failure
hid_sensor_custom_add_attributes() creates one sysfs group for each custom sensor field. If sysfs_create_group() fails after some groups have already been created, the function returns the error without removing the previously created groups.
Add a local unwind path to remove the groups that were already created. With enable_sensor exposed only after the field attributes are ready, this path can free sensor_inst->fields without leaving enable_sensor able to access pointers into that array.
AnalysisAI
Incomplete error-path cleanup in the Linux kernel HID custom sensor driver (hid-sensor-custom) creates a use-after-free condition: when hid_sensor_custom_add_attributes() fails partway through sysfs group creation, previously created groups are not removed and sensor_inst->fields can be freed while enable_sensor sysfs attributes retain stale pointers into that array. Systems running Linux kernel from commit 4a7de051 through versions prior to 6.12.109, 6.18.50, 7.2.4, and 7.3-rc1 are affected wherever the hid-sensor-custom module is loaded. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires all of the following: (1) the `hid-sensor-custom` kernel module must be loaded, which only occurs on systems with HID sensor hub hardware such as certain laptops with integrated ambient light or motion sensors; (2) a HID device connection (USB requiring physical access, or Bluetooth requiring adjacency) must cause `sysfs_create_group()` to fail mid-initialization - this is an abnormal kernel error condition, not trivially forced remotely; (3) a local user-space process must access the `enable_sensor` sysfs attribute during the window between the failed initialization and module cleanup. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 8.8 AV:A/AC:L/PR:N/UI:N vector is substantially overstated for this kernel error-path cleanup defect. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the vendor-released patches corresponding to your stable kernel branch: Linux 6.12.109, 6.18.50, 7.2.4, or 7.3-rc1. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all systems running kernel versions prior to 6.12.109, 6.18.50, 7.2.4, or 7.3-rc1 with the hid-sensor-custom module active, and classify by business criticality. …
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