CVE-2021-47339

{"id": "CVE-2021-47339", "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": "2024-05-21T15:15:20.693", "references": [{"url": "https://git.kernel.org/stable/c/7b53cca764f9b291b7907fcd39d9e66ad728ee0b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/bfb48b54db25c3b4ef4bef5e0691464ebc4aa335", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/dc02c0b2bd6096f2f3ce63e1fc317aeda05f74d8", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7b53cca764f9b291b7907fcd39d9e66ad728ee0b", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/bfb48b54db25c3b4ef4bef5e0691464ebc4aa335", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/dc02c0b2bd6096f2f3ce63e1fc317aeda05f74d8", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "[email protected]", "description": [{"lang": "en", "value": "CWE-908"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: v4l2-core: explicitly clear ioctl input data\n\nAs seen from a recent syzbot bug report, mistakes in the compat ioctl\nimplementation can lead to uninitialized kernel stack data getting used\nas input for driver ioctl handlers.\n\nThe reported bug is now fixed, but it's possible that other related\nbugs are still present or get added in the future. As the drivers need\nto check user input already, the possible impact is fairly low, but it\nmight still cause an information leak.\n\nTo be on the safe side, always clear the entire ioctl buffer before\ncalling the conversion handler functions that are meant to initialize\nthem."}, {"lang": "es", "value": " En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: medios: v4l2-core: borrar expl\u00edcitamente los datos de entrada de ioctl. Como se ve en un informe de error reciente de syzbot, los errores en la implementaci\u00f3n de compat ioctl pueden llevar a que los datos de la pila del kernel no inicializados se utilicen como entrada para controladores de ioctl del conductor. El error informado ya est\u00e1 solucionado, pero es posible que otros errores relacionados sigan presentes o se agreguen en el futuro. Como los controladores ya necesitan verificar la entrada del usuario, el posible impacto es bastante bajo, pero a\u00fan as\u00ed podr\u00eda causar una fuga de informaci\u00f3n. Para estar seguro, borre siempre todo el b\u00fafer ioctl antes de llamar a las funciones del controlador de conversi\u00f3n destinadas a inicializarlos."}], "lastModified": "2025-03-06T12:57:52.070", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "921ECC8D-5569-4A2C-ABD6-C7747BC6A7CF", "versionEndExcluding": "5.12.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "853187F6-707A-487B-95C0-621B5211B43C", "versionEndExcluding": "5.13.3", "versionStartIncluding": "5.13"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}