cve-2024-12254
Vulnerability from cvelistv5
Published
2024-12-06 15:19
Modified
2025-04-04 23:03
Summary
Unbounded memory buffering in SelectorSocketTransport.writelines()
Impacted products
Show details on NVD website


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    "cveId": "CVE-2024-12254",
    "datePublished": "2024-12-06T15:19:41.576Z",
    "dateReserved": "2024-12-05T16:17:55.154Z",
    "dateUpdated": "2025-04-04T23:03:00.653Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-12254\",\"sourceIdentifier\":\"cna@python.org\",\"published\":\"2024-12-06T16:15:20.623\",\"lastModified\":\"2025-04-04T23:15:39.980\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Starting in Python 3.12.0, the asyncio._SelectorSocketTransport.writelines()\\n method would not \\\"pause\\\" writing and signal to the Protocol to drain \\nthe buffer to the wire once the write buffer reached the \\\"high-water \\nmark\\\". Because of this, Protocols would not periodically drain the write\\n buffer potentially leading to memory exhaustion.\\n\\n\\n\\n\\n\\nThis\\n vulnerability likely impacts a small number of users, you must be using\\n Python 3.12.0 or later, on macOS or Linux, using the asyncio module \\nwith protocols, and using .writelines() method which had new \\nzero-copy-on-write behavior in Python 3.12.0 and later. If not all of \\nthese factors are true then your usage of Python is unaffected.\"},{\"lang\":\"es\",\"value\":\"Starting de Python 3.12.0, el m\u00e9todo asyncio._SelectorSocketTransport.writelines() no \\\"pausaba\\\" la escritura ni enviaba se\u00f1ales al protocolo para que vaciara el b\u00fafer hacia el cable una vez que el b\u00fafer de escritura alcanzaba el \\\"l\u00edmite superior\\\". Debido a esto, los protocolos no vaciaban peri\u00f3dicamente el b\u00fafer de escritura, lo que podr\u00eda provocar el agotamiento de la memoria. Es probable que esta vulnerabilidad afecte a una peque\u00f1a cantidad de usuarios. Debes usar Python 3.12.0 o posterior, en macOS o Linux, usar el m\u00f3dulo asyncio con protocolos y usar el m\u00e9todo .writelines(), que ten\u00eda un nuevo comportamiento de copia cero al escribir en Python 3.12.0 y posterior. 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  }
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
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