CVE-2025-21657

{"id": "CVE-2025-21657", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "[email protected]", "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": "2025-01-21T13:15:09.340", "references": [{"url": "https://git.kernel.org/stable/c/6268d5bc10354fc2ab8d44a0cd3b042d49a0417e", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d9e446dd63cee7161717a6a8414ba9c6435af764", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "[email protected]", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Replace rq_lock() to raw_spin_rq_lock() in scx_ops_bypass()\n\nscx_ops_bypass() iterates all CPUs to re-enqueue all the scx tasks.\nFor each CPU, it acquires a lock using rq_lock() regardless of whether\na CPU is offline or the CPU is currently running a task in a higher\nscheduler class (e.g., deadline). The rq_lock() is supposed to be used\nfor online CPUs, and the use of rq_lock() may trigger an unnecessary\nwarning in rq_pin_lock(). Therefore, replace rq_lock() to\nraw_spin_rq_lock() in scx_ops_bypass().\n\nWithout this change, we observe the following warning:\n\n===== START =====\n[ 6.615205] rq->balance_callback && rq->balance_callback != &balance_push_callback\n[ 6.615208] WARNING: CPU: 2 PID: 0 at kernel/sched/sched.h:1730 __schedule+0x1130/0x1c90\n===== END ====="}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sched_ext: Reemplace rq_lock() por raw_spin_rq_lock() en scx_ops_bypass() scx_ops_bypass() itera todas las CPU para volver a poner en cola todas las tareas de scx. Para cada CPU, adquiere un bloqueo mediante rq_lock() independientemente de si una CPU est\u00e1 fuera de l\u00ednea o si la CPU est\u00e1 ejecutando actualmente una tarea en una clase de programador superior (por ejemplo, fecha l\u00edmite). Se supone que rq_lock() se debe utilizar para CPU en l\u00ednea, y el uso de rq_lock() puede activar una advertencia innecesaria en rq_pin_lock(). Por lo tanto, reemplace rq_lock() por raw_spin_rq_lock() en scx_ops_bypass(). Sin este cambio, observamos la siguiente advertencia: ===== START ===== [ 6.615205] rq->balance_callback && rq->balance_callback != &balance_push_callback [ 6.615208] ADVERTENCIA: CPU: 2 PID: 0 en kernel/sched/sched.h:1730 __schedule+0x1130/0x1c90 ===== END ========== "}], "lastModified": "2025-10-15T13:48:46.157", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2812EE25-BBB7-4C1D-8B29-4EBB100EB7AE", "versionEndExcluding": "6.12.10", "versionStartIncluding": "6.12.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0E698080-7669-4132-8817-4C674EEBCE54"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "24B88717-53F5-42AA-9B72-14C707639E3F"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1EF8CD82-1EAE-4254-9545-F85AB94CF90F"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "62567B3C-6CEE-46D0-BC2E-B3717FBF7D13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5A073481-106D-4B15-B4C7-FB0213B8E1D4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DE491969-75AE-4A6B-9A58-8FC5AF98798F"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "93C0660D-7FB8-4FBA-892A-B064BA71E49E"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "034C36A6-C481-41F3-AE9A-D116E5BE6895"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8AF9DC49-2085-4FFB-A7E3-73DFAFECC7F2"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}