CVE-2024-46706

{"id": "CVE-2024-46706", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-09-13T07:15:05.560", "references": [{"url": "https://git.kernel.org/stable/c/3ecf625d4acb71d726bc0b49403cf68388b3d58d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/8eb92cfca6c2c5a15ab1773f3d18ab8d8f7dbb68", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/dc98d76a15bc29a9a4e76f2f65f39f3e590fb15c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: fsl_lpuart: mark last busy before uart_add_one_port\n\nWith \"earlycon initcall_debug=1 loglevel=8\" in bootargs, kernel\nsometimes boot hang. It is because normal console still is not ready,\nbut runtime suspend is called, so early console putchar will hang\nin waiting TRDE set in UARTSTAT.\n\nThe lpuart driver has auto suspend delay set to 3000ms, but during\nuart_add_one_port, a child device serial ctrl will added and probed with\nits pm runtime enabled(see serial_ctrl.c).\nThe runtime suspend call path is:\ndevice_add\n |-> bus_probe_device\n |->device_initial_probe\n\t |->__device_attach\n |-> pm_runtime_get_sync(dev->parent);\n\t\t\t |-> pm_request_idle(dev);\n\t\t\t |-> pm_runtime_put(dev->parent);\n\nSo in the end, before normal console ready, the lpuart get runtime\nsuspended. And earlycon putchar will hang.\n\nTo address the issue, mark last busy just after pm_runtime_enable,\nthree seconds is long enough to switch from bootconsole to normal\nconsole."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tty: serial: fsl_lpuart: marcar el \u00faltimo ocupado antes de uart_add_one_port Con \"earlycon initcall_debug=1 loglevel=8\" en bootargs, el kernel a veces se bloquea al iniciar. Esto se debe a que la consola normal a\u00fan no est\u00e1 lista, pero se llama a la suspensi\u00f3n en tiempo de ejecuci\u00f3n, por lo que la consola temprana putchar se bloquear\u00e1 esperando que se establezca TRDE en UARTSTAT. El controlador lpuart tiene un retraso de suspensi\u00f3n autom\u00e1tica establecido en 3000 ms, pero durante uart_add_one_port, se agregar\u00e1 un dispositivo secundario serial ctrl y se sondear\u00e1 con su tiempo de ejecuci\u00f3n pm habilitado (consulte serial_ctrl.c). La ruta de la llamada a la suspensi\u00f3n en tiempo de ejecuci\u00f3n es: device_add |-> bus_probe_device |->device_initial_probe |->__device_attach |-> pm_runtime_get_sync(dev->parent); |-> pm_request_idle(dev); |-> pm_runtime_put(dev->parent); Por lo tanto, al final, antes de que la consola normal est\u00e9 lista, el tiempo de ejecuci\u00f3n de lpuart get se suspende. Y el putchar de earlycon se bloquea. Para solucionar el problema, marque la \u00faltima vez que est\u00e1 ocupado justo despu\u00e9s de pm_runtime_enable; tres segundos son suficientes para cambiar de la consola de arranque a la consola normal."}], "lastModified": "2024-09-19T17:51:07.670", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9DE9201A-CE6B-4726-BABB-8265EA0F8AE4", "versionEndExcluding": "6.6.48", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D2AFDFD1-D95A-4EB7-843B-5E7659518B67", "versionEndExcluding": "6.10.7", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8B3CE743-2126-47A3-8B7C-822B502CF119"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4DEB27E7-30AA-45CC-8934-B89263EF3551"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E0005AEF-856E-47EB-BFE4-90C46899394D"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}