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nvd-json-data-feeds/CVE-2021/CVE-2021-34xx/CVE-2021-3491.json
cad-safe-bot e6cbafdc40 Auto-Update: 2024-12-08T03:00:18.988682+00:00
2024-12-08 03:06:42 +00:00

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{
"id": "CVE-2021-3491",
"sourceIdentifier": "security@ubuntu.com",
"published": "2021-06-04T02:15:07.253",
"lastModified": "2024-11-21T06:21:40.063",
"vulnStatus": "Modified",
"cveTags": [],
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"value": "The io_uring subsystem in the Linux kernel allowed the MAX_RW_COUNT limit to be bypassed in the PROVIDE_BUFFERS operation, which led to negative values being usedin mem_rw when reading /proc/<PID>/mem. This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was addressed via commit d1f82808877b (\"io_uring: truncate lengths larger than MAX_RW_COUNT on provide buffers\") (v5.13-rc1) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced in ddf0322db79c (\"io_uring: add IORING_OP_PROVIDE_BUFFERS\") (v5.7-rc1)."
},
{
"lang": "es",
"value": "El subsistema io_uring del kernel de Linux permit\u00eda saltarse el l\u00edmite MAX_RW_COUNT en la operaci\u00f3n PROVIDE_BUFFERS, lo que llevaba a utilizar valores negativos en mem_rw al leer /proc//mem. Esto pod\u00eda utilizarse para crear un desbordamiento de la pila que conduc\u00eda a la ejecuci\u00f3n de c\u00f3digo arbitrario en el kernel. Se solucion\u00f3 mediante el commit d1f82808877b (\"io_uring: truncate lengths larger than MAX_RW_COUNT on provide buffers\") (v5.13-rc1) y se retroaliment\u00f3 a los kernels estables en versiones v5.12.4, v5.11.21 y v5.10.37. Se introdujo en ddf0322db79c (\"io_uring: add IORING_OP_PROVIDE_BUFFERS\") (v5.7-rc1)."
}
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"attackComplexity": "HIGH",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
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