2025-04-01 16:03:53 +00:00

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{
"id": "CVE-2022-49761",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-03-27T17:15:41.407",
"lastModified": "2025-04-01T15:40:43.063",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: always report error in run_one_delayed_ref()\n\nCurrently we have a btrfs_debug() for run_one_delayed_ref() failure, but\nif end users hit such problem, there will be no chance that\nbtrfs_debug() is enabled. This can lead to very little useful info for\ndebugging.\n\nThis patch will:\n\n- Add extra info for error reporting\n Including:\n * logical bytenr\n * num_bytes\n * type\n * action\n * ref_mod\n\n- Replace the btrfs_debug() with btrfs_err()\n\n- Move the error reporting into run_one_delayed_ref()\n This is to avoid use-after-free, the @node can be freed in the caller.\n\nThis error should only be triggered at most once.\n\nAs if run_one_delayed_ref() failed, we trigger the error message, then\ncausing the call chain to error out:\n\nbtrfs_run_delayed_refs()\n`- btrfs_run_delayed_refs()\n `- btrfs_run_delayed_refs_for_head()\n `- run_one_delayed_ref()\n\nAnd we will abort the current transaction in btrfs_run_delayed_refs().\nIf we have to run delayed refs for the abort transaction,\nrun_one_delayed_ref() will just cleanup the refs and do nothing, thus no\nnew error messages would be output."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: siempre informa el error en run_one_delayed_ref() Actualmente tenemos un btrfs_debug() para el fallo de run_one_delayed_ref(), pero si los usuarios finales se encuentran con dicho problema, no habr\u00e1 ninguna posibilidad de que btrfs_debug() est\u00e9 habilitado. Esto puede llevar a muy poca informaci\u00f3n \u00fatil para la depuraci\u00f3n. Este parche har\u00e1 lo siguiente: - Agregar informaci\u00f3n adicional para el informe de errores Incluyendo: * byte l\u00f3gico * num_bytes * tipo * acci\u00f3n * ref_mod - Reemplazar btrfs_debug() con btrfs_err() - Mover el informe de errores a run_one_delayed_ref() Esto es para evitar el use-after-free, el @nodo se puede liberar en el llamador. Este error solo debe activarse como m\u00e1ximo una vez. Como si run_one_delayed_ref() fallara, se genera un mensaje de error, lo que provoca que la cadena de llamadas genere un error: btrfs_run_delayed_refs() `- btrfs_run_delayed_refs() `- btrfs_run_delayed_refs_for_head() `- run_one_delayed_ref(). Abortaremos la transacci\u00f3n actual en btrfs_run_delayed_refs(). Si necesitamos ejecutar referencias retrasadas para la transacci\u00f3n abortada, run_one_delayed_ref() simplemente las limpiar\u00e1 y no har\u00e1 nada, por lo que no se generar\u00e1n nuevos mensajes de error."
}
],
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"cvssMetricV31": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"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
}
]
},
"weaknesses": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-416"
}
]
}
],
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"negate": false,
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"references": [
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