fkie_cve-2025-21980
Vulnerability from fkie_nvd
Published
2025-04-01 16:15
Modified
2025-11-03 20:17
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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: sched: address a potential NULL pointer dereference in the GRED scheduler. If kzalloc in gred_init returns a NULL pointer, the code follows the error handling path, invoking gred_destroy. This, in turn, calls gred_offload, where memset could receive a NULL pointer as input, potentially leading to a kernel crash. When table->opt is NULL in gred_init(), gred_change_table_def() is not called yet, so it is not necessary to call ->ndo_setup_tc() in gred_offload().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0f0a152957d64ce45b4c27c687e7d087e8f45079Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/115ef44a98220fddfab37a39a19370497cd718b9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5f996b4f80c2cef1f9c77275055e7fcba44c9199Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/68896dd50180b38ea552e49a6a00b685321e5769Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d02c9acd68950a444acda18d514e2b41f846cb7fPatch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.14
linux linux_kernel 6.14
linux linux_kernel 6.14
linux linux_kernel 6.14
linux linux_kernel 6.14
linux linux_kernel 6.14


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched: address a potential NULL pointer dereference in the GRED scheduler.\n\nIf kzalloc in gred_init returns a NULL pointer, the code follows the\nerror handling path, invoking gred_destroy. This, in turn, calls\ngred_offload, where memset could receive a NULL pointer as input,\npotentially leading to a kernel crash.\n\nWhen table-\u003eopt is NULL in gred_init(), gred_change_table_def()\nis not called yet, so it is not necessary to call -\u003endo_setup_tc()\nin gred_offload()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sched: soluciona una posible desreferencia de puntero nulo en el programador GRED. Si kzalloc en gred_init devuelve un puntero nulo, el c\u00f3digo sigue la ruta de gesti\u00f3n de errores, invocando gred_destroy. Esto, a su vez, llama a gred_offload, donde memset podr\u00eda recibir un puntero nulo como entrada, lo que podr\u00eda provocar un fallo del kernel. Cuando table-\u0026gt;opt es nulo en gred_init(), gred_change_table_def() a\u00fan no se llama, por lo que no es necesario llamar a -\u0026gt;ndo_setup_tc() en gred_offload()."
    }
  ],
  "id": "CVE-2025-21980",
  "lastModified": "2025-11-03T20:17:34.367",
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          "baseScore": 5.5,
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          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
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  "published": "2025-04-01T16:15:29.390",
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}


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