CVE-2026-23382

Description

In the Linux kernel, the following vulnerability has been resolved: HID: Add HID_CLAIMED_INPUT guards in raw_event callbacks missing them In commit 2ff5baa9b527 ("HID: appleir: Fix potential NULL dereference at raw event handle"), we handle the fact that raw event callbacks can happen even for a HID device that has not been "claimed" causing a crash if a broken device were attempted to be connected to the system. Fix up the remaining in-tree HID drivers that forgot to add this same check to resolve the same issue.

CVSS Details

CVSS Score

5.5

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Configurations (Affected Products)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* - VULNERABLE

Linux Kernel (多版本)

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

/*
 * PoC Concept: Triggering HID raw_event without claimed input
 * This simulates the logic flow causing the NULL pointer dereference.
 */

struct hid_device *hdev;
// Assume device is connected but not fully claimed yet

void vulnerable_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data, int size) {
    struct input_dev *input;

    // VULNERABILITY: Missing check for HID_CLAIMED_INPUT
    // The driver assumes 'input' is valid.
    // input = hid_get_drvdata(hdev); 

    // If the device is not claimed, 'input' might be NULL.
    if (input == NULL) {
        // This leads to Kernel Oops / Panic
        // panic(NULL pointer dereference);
    }

    // Attempting to use the input device leads to the crash
    input_event(input, EV_KEY, KEY_A, 1);
    input_sync(input);
}

/*
 * Fix: Add guard before accessing input device
 * if (test_bit(HID_CLAIMED_INPUT, &hdev->claimed)) {
 *     // safe to process
 * }
 */

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-23382
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-23382
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-23382/
[4] VulDB https://vuldb.com/cve/CVE-2026-23382
[5] https://git.kernel.org/stable/c/20864e3e41c74cda253a9fa6b6fe093c1461a6a9
[6] https://git.kernel.org/stable/c/575122cd6569c4c4aa13c4c9958fea506724c788
[7] https://git.kernel.org/stable/c/6e330889e6c8db99f04d4feb861d23de4e8fbb13
[8] https://git.kernel.org/stable/c/892dbaf46bb738dacf1fa663eadb3712c85868f0
[9] https://git.kernel.org/stable/c/ac83b0d91a3f4f0c012ba9c85fb99436cddb1208
[10] https://git.kernel.org/stable/c/b48284d7f0f76023b215a3409cdc989b5081eadf
[11] https://git.kernel.org/stable/c/de316c1edf15bc30ff5e0d4c7b37c70fd41cf319
[12] https://git.kernel.org/stable/c/ecfa6f34492c493a9a1dc2900f3edeb01c79946b

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-23382", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-03-25T11:16:38.330", "lastModified": "2026-04-24T18:42:01.033", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: Add HID_CLAIMED_INPUT guards in raw_event callbacks missing them\n\nIn commit 2ff5baa9b527 (\"HID: appleir: Fix potential NULL dereference at\nraw event handle\"), we handle the fact that raw event callbacks\ncan happen even for a HID device that has not been \"claimed\" causing a\ncrash if a broken device were attempted to be connected to the system.\n\nFix up the remaining in-tree HID drivers that forgot to add this same\ncheck to resolve the same issue."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nHID: Añadir protecciones HID_CLAIMED_INPUT en las retrollamadas de raw_event que las omiten\n\nEn el commit 2ff5baa9b527 ('HID: appleir: Corregir posible desreferencia NULL en el manejo de eventos raw'), abordamos el hecho de que las retrollamadas de eventos raw pueden ocurrir incluso para un dispositivo HID que no ha sido 'reclamado', causando un fallo si se intentara conectar un dispositivo defectuoso al sistema.\n\nCorregir los controladores HID restantes en el árbol que olvidaron añadir esta misma comprobación para resolver el mismo problema."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", 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