FKIE_CVE-2021-47453

Vulnerability from fkie_nvd - Published: 2024-05-22 07:15 - Updated: 2025-09-24 01:22
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ice: Avoid crash from unnecessary IDA free In the remove path, there is an attempt to free the aux_idx IDA whether it was allocated or not. This can potentially cause a crash when unloading the driver on systems that do not initialize support for RDMA. But, this free cannot be gated by the status bit for RDMA, since it is allocated if the driver detects support for RDMA at probe time, but the driver can enter into a state where RDMA is not supported after the IDA has been allocated at probe time and this would lead to a memory leak. Initialize aux_idx to an invalid value and check for a valid value when unloading to determine if an IDA free is necessary.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/73e30a62b19b9fbb4e6a3465c59da186630d5f2ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/777682e59840e24e6c5672197e6ffbcf4bff823bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/73e30a62b19b9fbb4e6a3465c59da186630d5f2ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/777682e59840e24e6c5672197e6ffbcf4bff823bPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 5.15
linux linux_kernel 5.15
linux linux_kernel 5.15
linux linux_kernel 5.15
linux linux_kernel 5.15
linux linux_kernel 5.15
To clipboard 

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nice: Avoid crash from unnecessary IDA free\n\nIn the remove path, there is an attempt to free the aux_idx IDA whether\nit was allocated or not.  This can potentially cause a crash when\nunloading the driver on systems that do not initialize support for RDMA.\nBut, this free cannot be gated by the status bit for RDMA, since it is\nallocated if the driver detects support for RDMA at probe time, but the\ndriver can enter into a state where RDMA is not supported after the IDA\nhas been allocated at probe time and this would lead to a memory leak.\n\nInitialize aux_idx to an invalid value and check for a valid value when\nunloading to determine if an IDA free is necessary."
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      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ice: Evite fallas por IDA innecesario libre en la ruta de eliminaci\u00f3n, hay un intento de liberar el IDA aux_idx, ya sea que est\u00e9 asignado o no. Potencialmente, esto puede provocar un bloqueo al descargar el controlador en sistemas que no inicializan la compatibilidad con RDMA. Sin embargo, esta liberaci\u00f3n no puede ser controlada por el bit de estado para RDMA, ya que se asigna si el controlador detecta soporte para RDMA en el momento de la prueba, pero el controlador puede entrar en un estado en el que RDMA no es compatible despu\u00e9s de que se haya asignado el IDA en el momento de la prueba. tiempo y esto provocar\u00eda una p\u00e9rdida de memoria. Inicialice aux_idx con un valor no v\u00e1lido y verifique si hay un valor v\u00e1lido al descargar para determinar si es necesaria una IDA libre."
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  "id": "CVE-2021-47453",
  "lastModified": "2025-09-24T01:22:42.303",
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
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        "type": "Primary"
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  "published": "2024-05-22T07:15:10.380",
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