fkie_cve-2021-47523
Vulnerability from fkie_nvd
Published
2024-05-24 15:15
Modified
2025-09-24 19:38
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
IB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr
This buffer is currently allocated in hfi1_init():
if (reinit)
ret = init_after_reset(dd);
else
ret = loadtime_init(dd);
if (ret)
goto done;
/* allocate dummy tail memory for all receive contexts */
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, "cannot allocate dummy tail memory\n");
ret = -ENOMEM;
goto done;
}
The reinit triggered path will overwrite the old allocation and leak it.
Fix by moving the allocation to hfi1_alloc_devdata() and the deallocation
to hfi1_free_devdata().
References
Impacted products
Vendor | Product | Version | |
---|---|---|---|
linux | linux_kernel | * | |
linux | linux_kernel | * | |
linux | linux_kernel | 5.16 | |
linux | linux_kernel | 5.16 | |
linux | linux_kernel | 5.16 | |
linux | linux_kernel | 5.16 |
{ "configurations": [ { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "FB0FAB17-52FB-4BF3-B486-EFF245B0651B", "versionEndExcluding": "5.10.85", "versionStartIncluding": "4.5", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6664ACE2-F748-4AE5-B98B-58803B0B2C3E", "versionEndExcluding": "5.15.8", "versionStartIncluding": "5.11", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*", "matchCriteriaId": "357AA433-37E8-4323-BFB2-3038D6E4B414", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*", "matchCriteriaId": "A73429BA-C2D9-4D0C-A75F-06A1CA8B3983", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*", "matchCriteriaId": "F621B5E3-E99D-49E7-90B9-EC3B77C95383", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*", "matchCriteriaId": "F7BFDCAA-1650-49AA-8462-407DD593F94F", "vulnerable": true } ], "negate": false, "operator": "OR" } ] } ], "cveTags": [], "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-\u003ercvhdrtail_dummy_kvaddr = dma_alloc_coherent(\u0026dd-\u003epcidev-\u003edev,\n\t\t\t\t\t\t\t sizeof(u64),\n\t\t\t\t\t\t\t \u0026dd-\u003ercvhdrtail_dummy_dma,\n\t\t\t\t\t\t\t GFP_KERNEL);\n\n\tif (!dd-\u003ercvhdrtail_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-\u0026gt;rcvhdrtail_dummy_kvaddr = dma_alloc_coherent(\u0026amp;dd-\u0026gt;pcidev-\u0026gt;dev, sizeof(u64), \u0026amp;dd-\u0026gt;rcvhdrtail_dummy_dma, GFP_KERNEL); if (!dd-\u0026gt;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()." } ], "id": "CVE-2021-47523", "lastModified": "2025-09-24T19:38:33.050", "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": "2024-05-24T15:15:14.743", "references": [ { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/2c08271f4ed0e24633b3f81ceff61052b9d45efc" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/60a8b5a1611b4a26de4839ab9c1fc2a9cf3e17c1" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/834d0fb978643eaf09da425de197cc16a7c2761b" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/2c08271f4ed0e24633b3f81ceff61052b9d45efc" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/60a8b5a1611b4a26de4839ab9c1fc2a9cf3e17c1" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/834d0fb978643eaf09da425de197cc16a7c2761b" } ], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [ { "description": [ { "lang": "en", "value": "CWE-401" } ], "source": "nvd@nist.gov", "type": "Primary" } ] }
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Sightings
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Nomenclature
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