CVE-2025-38537

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If the PHY's ofnode has an \"leds\" subnode, then the\nLEDs will be (un)registered when probing/removing the genphy driver.\nThis could occur if the leds are for a non-generic driver that isn't\nloaded for whatever reason. Synchronously removing the PHY device in\nphy_detach leads to the following deadlock:\n\nrtnl_lock()\nndo_close()\n ...\n phy_detach()\n phy_remove()\n phy_leds_unregister()\n led_classdev_unregister()\n led_trigger_set()\n netdev_trigger_deactivate()\n unregister_netdevice_notifier()\n rtnl_lock()\n\nThere is a corresponding deadlock on the open/register side of things\n(and that one is reported by lockdep), but it requires a race while this\none is deterministic.\n\nGeneric PHYs do not support LEDs anyway, so don't bother registering\nthem."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: phy: No registrar los LED para genphy. Si una PHY no tiene controlador, el controlador genphy se prueba/elimina directamente en phy_attach/detach. Si el nodo ofnode de la PHY tiene un subnodo \"leds\", los LED se (des)registrar\u00e1n al probar/eliminar el controlador genphy. Esto podr\u00eda ocurrir si los LED corresponden a un controlador no gen\u00e9rico que no est\u00e1 cargado por cualquier motivo. La eliminaci\u00f3n sincr\u00f3nica del dispositivo PHY en phy_detach genera el siguiente bloqueo: rtnl_lock() ndo_close() ... phy_detach() phy_remove() phy_leds_unregister() led_classdev_unregister() led_trigger_set() netdev_trigger_deactivate() unregister_netdevice_notifier() rtnl_lock() Existe un bloqueo correspondiente en el lado de apertura/registro (y este es reportado por lockdep), pero requiere una ejecuci\u00f3n mientras que este es determinista. Los PHY gen\u00e9ricos no admiten LED de todos modos, as\u00ed que no se moleste en registrarlos."}], "id": "CVE-2025-38537", "lastModified": "2026-11-05T22:17:17.333", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-38537", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T21:03:25.479289Z", "version": "2.0.3"}}]}, "published": "2025-08-16T12:15:29.467", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/75e1b2079ef0653a2f7aa69be515d86b7faf1908"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ec158d05eaa91b2809cab65f8068290e3c05ebdd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f0f2b992d8185a0366be951685e08643aae17d6d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fd6493533af9e5d73d0d42ff2a8ded978a701dc6"}], "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: net: phy: Don't register LEDs for genphy", "id": "2388920", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2388920"}, "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"}, "cwe": "CWE-833", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: phy: Don't register LEDs for genphy\nIf a PHY has no driver, the genphy driver is probed/removed directly in\nphy_attach/detach. If the PHY's ofnode has an \"leds\" subnode, then the\nLEDs will be (un)registered when probing/removing the genphy driver.\nThis could occur if the leds are for a non-generic driver that isn't\nloaded for whatever reason. Synchronously removing the PHY device in\nphy_detach leads to the following deadlock:\nrtnl_lock()\nndo_close()\n...\nphy_detach()\nphy_remove()\nphy_leds_unregister()\nled_classdev_unregister()\nled_trigger_set()\nnetdev_trigger_deactivate()\nunregister_netdevice_notifier()\nrtnl_lock()\nThere is a corresponding deadlock on the open/register side of things\n(and that one is reported by lockdep), but it requires a race while this\none is deterministic.\nGeneric PHYs do not support LEDs anyway, so don't bother registering\nthem."], "name": "CVE-2025-38537", "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": "Out of support scope", "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": "2025-08-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38537\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38537\nhttps://lore.kernel.org/linux-cve-announce/2025081657-CVE-2025-38537-180a@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-08-18T20:50:07.875743+00:00", "updated": "2025-08-18T20:50:07.875852+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}