CVE-2023-53007

Estado: AnalizadaMedia (5.5)—

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

tracing: Make sure trace_printk() can output as soon as it can be used

Currently trace_printk() can be used as soon as early_trace_init() is called from start_kernel(). But if a crash happens, and "ftrace_dump_on_oops" is set on the kernel command line, all you get will be:

This is because the trace_printk() event (type 6) hasn't been registered yet. That gets done via an early_initcall(), which may be early, but not early enough.

Instead of registering the trace_printk() event (and other ftrace events, which are not trace events) via an early_initcall(), have them registered at the same time that trace_printk() can be used.

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This way, if there is a crash before early_initcall(), then the trace_printk()s will actually be useful.

Detalles técnicos trazas, registros y código del informe original

  [    0.456075]   <idle>-0         0dN.2. 347519us : Unknown type 6
  [    0.456075]   <idle>-0         0dN.2. 353141us : Unknown type 6
  [    0.456075]   <idle>-0         0dN.2. 358684us : Unknown type 6

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 5.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.20%
Percentil entre todas las CVEs puntuadas: 9
Fecha de la puntuación: 6/10/2026

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

NVD-CWE-noinfo

Referencias

JSON original (NVD)

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{
  "id": "CVE-2023-53007",
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          "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"
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        "exploitabilityScore": 1.8
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          "value": "NVD-CWE-noinfo"
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Make sure trace_printk() can output as soon as it can be used\n\nCurrently trace_printk() can be used as soon as early_trace_init() is\ncalled from start_kernel(). But if a crash happens, and\n\"ftrace_dump_on_oops\" is set on the kernel command line, all you get will\nbe:\n\n  [    0.456075]   <idle>-0         0dN.2. 347519us : Unknown type 6\n  [    0.456075]   <idle>-0         0dN.2. 353141us : Unknown type 6\n  [    0.456075]   <idle>-0         0dN.2. 358684us : Unknown type 6\n\nThis is because the trace_printk() event (type 6) hasn't been registered\nyet. That gets done via an early_initcall(), which may be early, but not\nearly enough.\n\nInstead of registering the trace_printk() event (and other ftrace events,\nwhich are not trace events) via an early_initcall(), have them registered at\nthe same time that trace_printk() can be used. This way, if there is a\ncrash before early_initcall(), then the trace_printk()s will actually be\nuseful."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: rastreo: Asegúrese de que trace_printk() pueda generar resultados tan pronto como sea posible. Actualmente, trace_printk() puede usarse tan pronto como se llame a early_trace_init() desde start_kernel(). Sin embargo, si se produce un fallo y se configura \"ftrace_dump_on_oops\" en la línea de comandos del kernel, solo se obtendrá: [ 0.456075] -0 0dN.2.347519us : Tipo desconocido 6 [ 0.456075] -0 0dN.2.353141us : Tipo desconocido 6 [ 0.456075] -0 0dN.2.358684us : Tipo desconocido 6. Esto se debe a que el evento trace_printk() (tipo 6) aún no se ha registrado. Esto se realiza mediante una llamada early_initcall(), que puede ser temprana, pero no lo suficiente. En lugar de registrar el evento trace_printk() (y otros eventos ftrace, que no son eventos de seguimiento) mediante una llamada early_initcall(), regístrelos al mismo tiempo que trace_printk(). De esta forma, si se produce un fallo antes de la llamada early_initcall(), las llamadas trace_printk() serán realmente útiles."
    }
  ],
  "lastModified": "2026-06-17T06:44:06.327",
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}