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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."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncan: j1939: hacer que j1939_session_activate() falle si el dispositivo ya no est\u00e1 registrado\n\nsyzbot sigue reportando\n\n unregister_netdevice: waiting for vcan0 to become free. Usage count = 2\n\nincluso despu\u00e9s de que el commit 93a27b5891b8 ('can: j1939: a\u00f1adir llamadas faltantes en el manejador de notificaciones NETDEV_UNREGISTER') fue a\u00f1adido. Un parche de depuraci\u00f3n printk() encontr\u00f3 que j1939_session_activate() puede tener \u00e9xito incluso despu\u00e9s de que j1939_cancel_active_session() de j1939_netdev_notify(NETDEV_UNREGISTER) se haya completado.\n\nDado que j1939_cancel_active_session() se procesa con el bloqueo de la lista de sesiones mantenido, verificar ndev->reg_state en j1939_session_activate() con el bloqueo de la lista de sesiones mantenido puede cerrar de forma fiable la ventana de carrera."}], "id": "CVE-2025-71182", "lastModified": "2026-03-25T19:41:58.970", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-01-31T12:16:03.463", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/46ca9dc978923c5e1247a9e9519240ba7ace413c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5d5602236f5db19e8b337a2cd87a90ace5ea776d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/78d87b72cebe2a993fd5b017e9f14fb6278f2eae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/79dd3f1d9dd310c2af89b09c71f34d93973b200f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c3a4316e3c746af415c0fd6c6d489ad13f53714d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ebb0dfd718dd31c8d3600612ca4b7207ec3d923a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: can: j1939: make j1939_session_activate() fail if device is no longer registered", "id": "2435671", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2435671"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncan: j1939: make j1939_session_activate() fail if device is no longer registered\nsyzbot is still reporting\nunregister_netdevice: waiting for vcan0 to become free. Usage count = 2\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.\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."], "name": "CVE-2025-71182", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-01-31T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-71182\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-71182\nhttps://lore.kernel.org/linux-cve-announce/2026013134-CVE-2025-71182-54d0@gregkh/T"], "threat_severity": "Low"}

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