CVE-2024-35955
Estado: ModificadaAlta (8.8)—
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: kprobes: soluciona un posible problema de use after free en el registro de kprobe Al descargar un módulo, su estado cambia MODULE_STATE_LIVE -> MODULE_STATE_GOING -> MODULE_STATE_UNFORMED. Cada cambio llevará un tiempo. `is_module_text_address()` y `__module_text_address()` funcionan con MODULE_STATE_LIVE y MODULE_STATE_GOING.
Leer descripción completaMostrar menos
Si usamos `is_module_text_address()` y `__module_text_address()` por separado, existe la posibilidad de que el primero tenga éxito pero el siguiente falle porque module->state se convierte en MODULE_STATE_UNFORMED entre esas operaciones. En `check_kprobe_address_safe()`, si el segundo `__module_text_address()` falla, se ignora porque esperaba una dirección kernel_text. Pero es posible que haya fallado simplemente porque módulo->estado se cambió a MODULE_STATE_UNFORMED. En este caso, arm_kprobe() intentará modificar la dirección de texto del módulo que no existe (use after free). Para solucionar este problema, no debemos usar `is_module_text_address()` y `__module_text_address()` separados, sino usar solo `__module_text_address()` una vez y hacer `try_module_get(module)` que solo está disponible con MODULE_STATE_LIVE.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 8.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 1.18%
- Percentil entre todas las CVEs puntuadas: 67
- Fecha de la puntuación: 8/10/2026
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 (2)
CWE
- CWE-416
Referencias
- https://git.kernel.org/stable/c/2df2dd27066cdba8041e46a64362325626bdfb2e
- https://git.kernel.org/stable/c/325f3fb551f8cd672dbbfc4cf58b14f9ee3fc9e8
- https://git.kernel.org/stable/c/36b57c7d2f8b7de224980f1a284432846ad71ca0
- https://git.kernel.org/stable/c/5062d1f4f07facbdade0f402d9a04a788f52e26d
- https://git.kernel.org/stable/c/62029bc9ff2c17a4e3a2478d83418ec575413808
- https://git.kernel.org/stable/c/93eb31e7c3399e326259f2caa17be1e821f5a412
- https://git.kernel.org/stable/c/b5808d40093403334d939e2c3c417144d12a6f33
- https://git.kernel.org/stable/c/d15023fb407337028a654237d8968fefdcf87c2f
- https://git.kernel.org/stable/c/2df2dd27066cdba8041e46a64362325626bdfb2e
- https://git.kernel.org/stable/c/325f3fb551f8cd672dbbfc4cf58b14f9ee3fc9e8
- https://git.kernel.org/stable/c/36b57c7d2f8b7de224980f1a284432846ad71ca0
- https://git.kernel.org/stable/c/5062d1f4f07facbdade0f402d9a04a788f52e26d
- https://git.kernel.org/stable/c/62029bc9ff2c17a4e3a2478d83418ec575413808
- https://git.kernel.org/stable/c/93eb31e7c3399e326259f2caa17be1e821f5a412
- https://git.kernel.org/stable/c/b5808d40093403334d939e2c3c417144d12a6f33
- https://git.kernel.org/stable/c/d15023fb407337028a654237d8968fefdcf87c2f
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-613116.html
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkprobes: Fix possible use-after-free issue on kprobe registration\n\nWhen unloading a module, its state is changing MODULE_STATE_LIVE ->\n MODULE_STATE_GOING -> MODULE_STATE_UNFORMED. Each change will take\na time. `is_module_text_address()` and `__module_text_address()`\nworks with MODULE_STATE_LIVE and MODULE_STATE_GOING.\nIf we use `is_module_text_address()` and `__module_text_address()`\nseparately, there is a chance that the first one is succeeded but the\nnext one is failed because module->state becomes MODULE_STATE_UNFORMED\nbetween those operations.\n\nIn `check_kprobe_address_safe()`, if the second `__module_text_address()`\nis failed, that is ignored because it expected a kernel_text address.\nBut it may have failed simply because module->state has been changed\nto MODULE_STATE_UNFORMED. In this case, arm_kprobe() will try to modify\nnon-exist module text address (use-after-free).\n\nTo fix this problem, we should not use separated `is_module_text_address()`\nand `__module_text_address()`, but use only `__module_text_address()`\nonce and do `try_module_get(module)` which is only available with\nMODULE_STATE_LIVE."
},
{
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"value": "En el kernel de Linux, se resolvió la siguiente vulnerabilidad: kprobes: soluciona un posible problema de use after free en el registro de kprobe Al descargar un módulo, su estado cambia MODULE_STATE_LIVE -> MODULE_STATE_GOING -> MODULE_STATE_UNFORMED. Cada cambio llevará un tiempo. `is_module_text_address()` y `__module_text_address()` funcionan con MODULE_STATE_LIVE y MODULE_STATE_GOING. Si usamos `is_module_text_address()` y `__module_text_address()` por separado, existe la posibilidad de que el primero tenga éxito pero el siguiente falle porque module->state se convierte en MODULE_STATE_UNFORMED entre esas operaciones. En `check_kprobe_address_safe()`, si el segundo `__module_text_address()` falla, se ignora porque esperaba una dirección kernel_text. Pero es posible que haya fallado simplemente porque módulo->estado se cambió a MODULE_STATE_UNFORMED. En este caso, arm_kprobe() intentará modificar la dirección de texto del módulo que no existe (use after free). Para solucionar este problema, no debemos usar `is_module_text_address()` y `__module_text_address()` separados, sino usar solo `__module_text_address()` una vez y hacer `try_module_get(module)` que solo está disponible con MODULE_STATE_LIVE."
}
],
"lastModified": "2026-06-17T07:35:48.087",
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