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{
"id": "CVE-2022-49030",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2024-10-21T20:15:13.747",
"lastModified": "2024-10-24T18:42:07.703",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibbpf: Handle size overflow for ringbuf mmap\n\nThe maximum size of ringbuf is 2GB on x86-64 host, so 2 * max_entries\nwill overflow u32 when mapping producer page and data pages. Only\ncasting max_entries to size_t is not enough, because for 32-bits\napplication on 64-bits kernel the size of read-only mmap region\nalso could overflow size_t.\n\nSo fixing it by casting the size of read-only mmap region into a __u64\nand checking whether or not there will be overflow during mmap."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: libbpf: desbordamiento de tama\u00f1o del controlador para ringbuf mmap El tama\u00f1o m\u00e1ximo de ringbuf es de 2 GB en un host x86-64, por lo que 2 * max_entries desbordar\u00e1n u32 al asignar la p\u00e1gina del productor y las p\u00e1ginas de datos. Solo convertir max_entries a size_t no es suficiente, porque para la aplicaci\u00f3n de 32 bits en un kernel de 64 bits, el tama\u00f1o de la regi\u00f3n mmap de solo lectura tambi\u00e9n podr\u00eda desbordar size_t. Entonces, arr\u00e9glelo convirtiendo el tama\u00f1o de la regi\u00f3n mmap de solo lectura en __u64 y verificando si habr\u00e1 o no desbordamiento durante mmap."
}
],
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"type": "Primary",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9
}
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},
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"source": "nvd@nist.gov",
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"description": [
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"value": "CWE-190"
}
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