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CVE-2024-50132

Estado: ModificadaMedia (5.5)—

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

tracing/probes: Fix MAX_TRACE_ARGS limit handling

When creating a trace_probe we would set nr_args prior to truncating the arguments to MAX_TRACE_ARGS. However, we would only initialize arguments up to the limit.

This caused invalid memory access when attempting to set up probes with more than 128 fetchargs.

Resolve the issue by applying the MAX_TRACE_ARGS limit earlier. Return an error when there are too many arguments instead of silently truncating.

Detalles técnicos trazas, registros y código del informe original
  BUG: kernel NULL pointer dereference, address: 0000000000000020
  #PF: supervisor read access in kernel mode
  #PF: error_code(0x0000) - not-present page
  PGD 0 P4D 0
  Oops: Oops: 0000 [#1] PREEMPT SMP PTI
  CPU: 0 UID: 0 PID: 1769 Comm: cat Not tainted 6.11.0-rc7+ #8
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014
  RIP: 0010:__set_print_fmt+0x134/0x330

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)

Mostrar
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing/probes: Fix MAX_TRACE_ARGS limit handling\n\nWhen creating a trace_probe we would set nr_args prior to truncating the\narguments to MAX_TRACE_ARGS. However, we would only initialize arguments\nup to the limit.\n\nThis caused invalid memory access when attempting to set up probes with\nmore than 128 fetchargs.\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000020\n  #PF: supervisor read access in kernel mode\n  #PF: error_code(0x0000) - not-present page\n  PGD 0 P4D 0\n  Oops: Oops: 0000 [#1] PREEMPT SMP PTI\n  CPU: 0 UID: 0 PID: 1769 Comm: cat Not tainted 6.11.0-rc7+ #8\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014\n  RIP: 0010:__set_print_fmt+0x134/0x330\n\nResolve the issue by applying the MAX_TRACE_ARGS limit earlier. Return\nan error when there are too many arguments instead of silently\ntruncating."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: rastreo/sondas: Se corrige el manejo del límite MAX_TRACE_ARGS Al crear un trace_probe, estableceríamos nr_args antes de truncar los argumentos a MAX_TRACE_ARGS. Sin embargo, solo inicializaríamos los argumentos hasta el límite. Esto causaba un acceso no válido a la memoria al intentar configurar sondas con más de 128 fetchargs. ERROR: desreferencia de puntero NULL del kernel, dirección: 0000000000000020 #PF: acceso de lectura del supervisor en modo kernel #PF: error_code(0x0000) - página no presente PGD 0 P4D 0 Oops: Oops: 0000 [#1] PREEMPT SMP PTI CPU: 0 UID: 0 PID: 1769 Comm: cat No contaminado 6.11.0-rc7+ #8 Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014 RIP: 0010:__set_print_fmt+0x134/0x330 Resuelva el problema aplicando el límite MAX_TRACE_ARGS anteriormente. Devuelva un error cuando haya demasiados argumentos en lugar de truncarlos silenciosamente."
    }
  ],
  "lastModified": "2026-08-04T11:21:24.010",
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