CVE-2025-71182
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
can: j1939: make j1939_session_activate() fail if device is no longer registered
syzbot is still reporting
even after commit 93a27b5891b8 ("can: j1939: add missing calls in NETDEV_UNREGISTER notification handler") was added. A debug printk() patch found that j1939_session_activate() can succeed even after j1939_cancel_active_session() from j1939_netdev_notify(NETDEV_UNREGISTER) has completed.
Since j1939_cancel_active_session() is processed with the session list lock held, checking ndev->reg_state in j1939_session_activate() with the session list lock held can reliably close the race window.
Detalles técnicos trazas, registros y código del informe original
unregister_netdevice: waiting for vcan0 to become free. Usage count = 2
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.18%
- Percentil entre todas las CVEs puntuadas: 7
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/46ca9dc978923c5e1247a9e9519240ba7ace413c
- https://git.kernel.org/stable/c/5d5602236f5db19e8b337a2cd87a90ace5ea776d
- https://git.kernel.org/stable/c/78d87b72cebe2a993fd5b017e9f14fb6278f2eae
- https://git.kernel.org/stable/c/79dd3f1d9dd310c2af89b09c71f34d93973b200f
- https://git.kernel.org/stable/c/ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536
- https://git.kernel.org/stable/c/c3a4316e3c746af415c0fd6c6d489ad13f53714d
- https://git.kernel.org/stable/c/ebb0dfd718dd31c8d3600612ca4b7207ec3d923a
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: j1939: make j1939_session_activate() fail if device is no longer registered\n\nsyzbot is still reporting\n\n unregister_netdevice: waiting for vcan0 to become free. Usage count = 2\n\neven after commit 93a27b5891b8 (\"can: j1939: add missing calls in\nNETDEV_UNREGISTER notification handler\") was added. A debug printk() patch\nfound that j1939_session_activate() can succeed even after\nj1939_cancel_active_session() from j1939_netdev_notify(NETDEV_UNREGISTER)\nhas completed.\n\nSince j1939_cancel_active_session() is processed with the session list lock\nheld, checking ndev->reg_state in j1939_session_activate() with the session\nlist lock held can reliably close the race window."
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