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CVE-2024-57930

Estado: ModificadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

tracing: Have process_string() also allow arrays

In order to catch a common bug where a TRACE_EVENT() TP_fast_assign() assigns an address of an allocated string to the ring buffer and then references it in TP_printk(), which can be executed hours later when the string is free, the function test_event_printk() runs on all events as they are registered to make sure there's no unwanted dereferencing.

It calls process_string() to handle cases in TP_printk() format that has "%s". It returns whether or not the string is safe. But it can have some false positives.

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For instance, xe_bo_move() has:

Where the "%s" references into xe_mem_type_to_name[]. This is an array of pointers that should be safe for the event to access. Instead of flagging this as a bad reference, if a reference points to an array, where the record field is the index, consider it safe.

Detalles técnicos trazas, registros y código del informe original
 TP_printk("move_lacks_source:%s, migrate object %p [size %zu] from %s to %s device_id:%s",
            __entry->move_lacks_source ? "yes" : "no", __entry->bo, __entry->size,
            xe_mem_type_to_name[__entry->old_placement],
            xe_mem_type_to_name[__entry->new_placement], __get_str(device_id))

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2024-57930",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "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
      }
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          "programFiles": [
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        }
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  "published": "2025-01-21T12:15:26.600",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "NVD-CWE-noinfo"
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      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Have process_string() also allow arrays\n\nIn order to catch a common bug where a TRACE_EVENT() TP_fast_assign()\nassigns an address of an allocated string to the ring buffer and then\nreferences it in TP_printk(), which can be executed hours later when the\nstring is free, the function test_event_printk() runs on all events as\nthey are registered to make sure there's no unwanted dereferencing.\n\nIt calls process_string() to handle cases in TP_printk() format that has\n\"%s\". It returns whether or not the string is safe. But it can have some\nfalse positives.\n\nFor instance, xe_bo_move() has:\n\n TP_printk(\"move_lacks_source:%s, migrate object %p [size %zu] from %s to %s device_id:%s\",\n            __entry->move_lacks_source ? \"yes\" : \"no\", __entry->bo, __entry->size,\n            xe_mem_type_to_name[__entry->old_placement],\n            xe_mem_type_to_name[__entry->new_placement], __get_str(device_id))\n\nWhere the \"%s\" references into xe_mem_type_to_name[]. This is an array of\npointers that should be safe for the event to access. Instead of flagging\nthis as a bad reference, if a reference points to an array, where the\nrecord field is the index, consider it safe."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tracing: Hacer que process_string() también permita matrices Para detectar un error común en el que un TP_fast_assign() de TRACE_EVENT() asigna una dirección de una cadena asignada al búfer de anillo y luego la referencia en TP_printk(), que se puede ejecutar horas después cuando la cadena está libre, la función test_event_printk() se ejecuta en todos los eventos a medida que se registran para asegurarse de que no haya desreferenciaciones no deseadas. Llama a process_string() para gestionar los casos en formato TP_printk() que tienen \"%s\". Devuelve si la cadena es segura o no. Pero puede tener algunos falsos positivos. Por ejemplo, xe_bo_move() tiene: TP_printk(\"move_lacks_source:%s, migrate object %p [size %zu] from %s to %s device_id:%s\", __entry->move_lacks_source ? \"yes\" : \"no\", __entry->bo, __entry->size, xe_mem_type_to_name[__entry->old_placement], xe_mem_type_to_name[__entry->new_placement], __get_str(device_id)) Where the \"%s\" Donde \"%s\" hace referencia a xe_mem_type_to_name[]. Esta es una matriz de punteros a los que el evento debería poder acceder de forma segura. En lugar de marcar esto como una referencia incorrecta, si una referencia apunta a una matriz, donde el campo de registro es el índice, considérela segura."
    }
  ],
  "lastModified": "2026-06-17T08:14:15.550",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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}