CVE-2021-47523

{"id": "CVE-2021-47523", "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": "2024-05-24T15:15:14.743", "references": [{"url": "https://git.kernel.org/stable/c/2c08271f4ed0e24633b3f81ceff61052b9d45efc", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/60a8b5a1611b4a26de4839ab9c1fc2a9cf3e17c1", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/834d0fb978643eaf09da425de197cc16a7c2761b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/2c08271f4ed0e24633b3f81ceff61052b9d45efc", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/60a8b5a1611b4a26de4839ab9c1fc2a9cf3e17c1", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/834d0fb978643eaf09da425de197cc16a7c2761b", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "[email protected]", "description": [{"lang": "en", "value": "CWE-401"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nIB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr\n\nThis buffer is currently allocated in hfi1_init():\n\n\tif (reinit)\n\t\tret = init_after_reset(dd);\n\telse\n\t\tret = loadtime_init(dd);\n\tif (ret)\n\t\tgoto done;\n\n\t/* allocate dummy tail memory for all receive contexts */\n\tdd->rcvhdrtail_dummy_kvaddr = dma_alloc_coherent(&dd->pcidev->dev,\n\t\t\t\t\t\t\t sizeof(u64),\n\t\t\t\t\t\t\t &dd->rcvhdrtail_dummy_dma,\n\t\t\t\t\t\t\t GFP_KERNEL);\n\n\tif (!dd->rcvhdrtail_dummy_kvaddr) {\n\t\tdd_dev_err(dd, \"cannot allocate dummy tail memory\\n\");\n\t\tret = -ENOMEM;\n\t\tgoto done;\n\t}\n\nThe reinit triggered path will overwrite the old allocation and leak it.\n\nFix by moving the allocation to hfi1_alloc_devdata() and the deallocation\nto hfi1_free_devdata()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: IB/hfi1: Correcci\u00f3n de fuga de rcvhdrtail_dummy_kvaddr. Este b\u00fafer est\u00e1 actualmente asignado en hfi1_init(): if (reinit) ret = init_after_reset(dd); de lo contrario ret = loadtime_init(dd); si (ret) ir a hecho; /* asigna memoria de cola ficticia para todos los contextos de recepci\u00f3n */ dd->rcvhdrtail_dummy_kvaddr = dma_alloc_coherent(&dd->pcidev->dev, sizeof(u64), &dd->rcvhdrtail_dummy_dma, GFP_KERNEL); if (!dd->rcvhdrtail_dummy_kvaddr) { dd_dev_err(dd, \"no se puede asignar memoria de cola ficticia\\n\"); ret = -ENOMEM; ir a hacer; } La ruta activada por reinicio sobrescribir\u00e1 la asignaci\u00f3n anterior y la filtrar\u00e1. Para solucionarlo, mueva la asignaci\u00f3n a hfi1_alloc_devdata() y la desasignaci\u00f3n a hfi1_free_devdata()."}], "lastModified": "2025-09-24T19:38:33.050", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FB0FAB17-52FB-4BF3-B486-EFF245B0651B", "versionEndExcluding": "5.10.85", "versionStartIncluding": "4.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6664ACE2-F748-4AE5-B98B-58803B0B2C3E", "versionEndExcluding": "5.15.8", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "357AA433-37E8-4323-BFB2-3038D6E4B414"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A73429BA-C2D9-4D0C-A75F-06A1CA8B3983"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F621B5E3-E99D-49E7-90B9-EC3B77C95383"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F7BFDCAA-1650-49AA-8462-407DD593F94F"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}