CVE-2025-68822
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: Input: alps - fix use-after-free bugs caused by dev3_register_work The dev3_register_work delayed work item is initialized within alps_reconnect() and scheduled upon receipt of the first bare PS/2 packet from an external PS/2 device connected to the ALPS touchpad. During device detachment, the original implementation calls flush_workqueue() in psmouse_disconnect() to ensure completion of dev3_register_work. However, the flush_workqueue() in psmouse_disconnect() only blocks and waits for work items that were already queued to the workqueue prior to its invocation. Any work items submitted after flush_workqueue() is called are not included in the set of tasks that the flush operation awaits. This means that after flush_workqueue() has finished executing, the dev3_register_work could still be scheduled. Although the psmouse state is set to PSMOUSE_CMD_MODE in psmouse_disconnect(), the scheduling of dev3_register_work remains unaffected. The race condition can occur as follows: CPU 0 (cleanup path) | CPU 1 (delayed work) psmouse_disconnect() | psmouse_set_state() | flush_workqueue() | alps_report_bare_ps2_packet() alps_disconnect() | psmouse_queue_work() kfree(priv); // FREE | alps_register_bare_ps2_mouse() | priv = container_of(work...); // USE | priv->dev3 // USE Add disable_delayed_work_sync() in alps_disconnect() to ensure that dev3_register_work is properly canceled and prevented from executing after the alps_data structure has been deallocated. This bug is identified by static analysis.
Severity
HIGH
CVSS score
7.8
(v3.1)
Vulnerability status
Deferred
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-01-13 16:16:04.550000
Last modified
2026-10-30 13:18:24.947000
View original CVE JSON
{
"id": "CVE-2025-68822",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-01-13T16:16:04.550",
"lastModified": "2026-10-30T13:18:24.947",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: alps - fix use-after-free bugs caused by dev3_register_work\n\nThe dev3_register_work delayed work item is initialized within\nalps_reconnect() and scheduled upon receipt of the first bare\nPS/2 packet from an external PS/2 device connected to the ALPS\ntouchpad. During device detachment, the original implementation\ncalls flush_workqueue() in psmouse_disconnect() to ensure\ncompletion of dev3_register_work. However, the flush_workqueue()\nin psmouse_disconnect() only blocks and waits for work items that\nwere already queued to the workqueue prior to its invocation. Any\nwork items submitted after flush_workqueue() is called are not\nincluded in the set of tasks that the flush operation awaits.\nThis means that after flush_workqueue() has finished executing,\nthe dev3_register_work could still be scheduled. Although the\npsmouse state is set to PSMOUSE_CMD_MODE in psmouse_disconnect(),\nthe scheduling of dev3_register_work remains unaffected.\n\nThe race condition can occur as follows:\n\nCPU 0 (cleanup path) | CPU 1 (delayed work)\npsmouse_disconnect() |\n psmouse_set_state() |\n flush_workqueue() | alps_report_bare_ps2_packet()\n alps_disconnect() | psmouse_queue_work()\n kfree(priv); // FREE | alps_register_bare_ps2_mouse()\n | priv = container_of(work...); // USE\n | priv->dev3 // USE\n\nAdd disable_delayed_work_sync() in alps_disconnect() to ensure\nthat dev3_register_work is properly canceled and prevented from\nexecuting after the alps_data structure has been deallocated.\n\nThis bug is identified by static analysis."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nEntrada: alps - corrige errores de uso después de liberación causados por dev3_register_work\n\nEl elemento de trabajo retrasado dev3_register_work se inicializa dentro de alps_reconnect() y se programa al recibir el primer paquete PS/2 'bare' de un dispositivo PS/2 externo conectado al touchpad ALPS. Durante la desconexión del dispositivo, la implementación original llama a flush_workqueue() en psmouse_disconnect() para asegurar la finalización de dev3_register_work. Sin embargo, la flush_workqueue() en psmouse_disconnect() solo bloquea y espera por elementos de trabajo que ya estaban en cola en la workqueue antes de su invocación. Cualquier elemento de trabajo enviado después de que se llama a flush_workqueue() no se incluye en el conjunto de tareas que la operación de 'flush' espera. Esto significa que después de que flush_workqueue() ha terminado de ejecutarse, el dev3_register_work aún podría programarse. Aunque el estado de psmouse se establece en PSMOUSE_CMD_MODE en psmouse_disconnect(), la programación de dev3_register_work permanece inalterada.\n\nLa condición de carrera puede ocurrir de la siguiente manera:\n\nCPU 0 (ruta de limpieza) | CPU 1 (trabajo retrasado)\npsmouse_disconnect() |\n psmouse_set_state() |\n flush_workqueue() | alps_report_bare_ps2_packet()\n alps_disconnect() | psmouse_queue_work()\n kfree(priv); // LIBERAR | alps_register_bare_ps2_mouse()\n | priv = container_of(work...); // USAR\n | priv->dev3 // USAR\n\nAñadir disable_delayed_work_sync() en alps_disconnect() para asegurar que dev3_register_work se cancele correctamente y se impida su ejecución después de que la estructura alps_data haya sido desasignada.\n\nEste error es identificado por análisis estático."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/input/mouse/alps.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "04aae283ba6a8cd4851d937bf9c6d6ef0361d794",
"lessThan": "55beb00222af2eee967322670a0c8f3c6426becb",
"versionType": "git",
"status": "affected"
},
{
"version": "04aae283ba6a8cd4851d937bf9c6d6ef0361d794",
"lessThan": "b9d8cfd6d77f5072a4df10646810d128220457fb",
"versionType": "git",
"status": "affected"
},
{
"version": "04aae283ba6a8cd4851d937bf9c6d6ef0361d794",
"lessThan": "ed8c61b89be0c45f029228b2913d5cf7b5cda1a7",
"versionType": "git",
"status": "affected"
},
{
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{
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"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/input/mouse/alps.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "4.0",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.0",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.191",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.160",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.64",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.3",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.19",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-10-16T15:05:36.678846Z",
"id": "CVE-2025-68822",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-416"
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/55beb00222af2eee967322670a0c8f3c6426becb",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
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{
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}