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nvd-json-data-feeds/CVE-2023/CVE-2023-526xx/CVE-2023-52638.json
cad-safe-bot 66943053a4 Auto-Update: 2025-02-03T17:00:33.409736+00:00
2025-02-03 17:04:00 +00:00

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{
"id": "CVE-2023-52638",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2024-04-03T15:15:51.417",
"lastModified": "2025-02-03T16:16:43.840",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: j1939: prevent deadlock by changing j1939_socks_lock to rwlock\n\nThe following 3 locks would race against each other, causing the\ndeadlock situation in the Syzbot bug report:\n\n- j1939_socks_lock\n- active_session_list_lock\n- sk_session_queue_lock\n\nA reasonable fix is to change j1939_socks_lock to an rwlock, since in\nthe rare situations where a write lock is required for the linked list\nthat j1939_socks_lock is protecting, the code does not attempt to\nacquire any more locks. This would break the circular lock dependency,\nwhere, for example, the current thread already locks j1939_socks_lock\nand attempts to acquire sk_session_queue_lock, and at the same time,\nanother thread attempts to acquire j1939_socks_lock while holding\nsk_session_queue_lock.\n\nNOTE: This patch along does not fix the unregister_netdevice bug\nreported by Syzbot; instead, it solves a deadlock situation to prepare\nfor one or more further patches to actually fix the Syzbot bug, which\nappears to be a reference counting problem within the j1939 codebase.\n\n[mkl: remove unrelated newline change]"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: j1939: previene el interbloqueo cambiando j1939_socks_lock a rwlock Los siguientes 3 bloqueos competir\u00edan entre s\u00ed, causando la situaci\u00f3n de interbloqueo en el informe de error de Syzbot: - j1939_socks_lock - active_session_list_lock - sk_session_queue_lock A Una soluci\u00f3n razonable es cambiar j1939_socks_lock por un rwlock, ya que en las raras situaciones en las que se requiere un bloqueo de escritura para la lista vinculada que j1939_socks_lock est\u00e1 protegiendo, el c\u00f3digo no intenta adquirir m\u00e1s bloqueos. Esto romper\u00eda la dependencia del bloqueo circular, donde, por ejemplo, el subproceso actual ya bloquea j1939_socks_lock e intenta adquirir sk_session_queue_lock y, al mismo tiempo, otro subproceso intenta adquirir j1939_socks_lock mientras mantiene sk_session_queue_lock. NOTA: Este parche no soluciona el error unregister_netdevice informado por Syzbot; en cambio, resuelve una situaci\u00f3n de punto muerto para prepararse para uno o m\u00e1s parches adicionales para corregir el error Syzbot, que parece ser un problema de conteo de referencias dentro del c\u00f3digo base j1939. [mkl: eliminar cambio de nueva l\u00ednea no relacionado]"
}
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"source": "nvd@nist.gov",
"type": "Primary",
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"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
}
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},
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"source": "nvd@nist.gov",
"type": "Primary",
"description": [
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"lang": "en",
"value": "CWE-667"
}
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