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CVE-2023-32246

Estado: AnalizadaMedia (5.5)—

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

ksmbd: call rcu_barrier() in ksmbd_server_exit()

racy issue is triggered the bug by racing between closing a connection and rmmod. In ksmbd, rcu_barrier() is not called at module unload time, so nothing prevents ksmbd from getting unloaded while it still has RCU callbacks pending. It leads to trigger unintended execution of kernel code locally and use to defeat protections such as Kernel Lockdown

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)

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{
  "id": "CVE-2023-32246",
  "cveTags": [],
  "metrics": {
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "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"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
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          ],
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        {
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          "vendor": "Linux",
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          "programFiles": [
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  ],
  "published": "2025-08-16T14:15:26.393",
  "references": [
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      "url": "https://git.kernel.org/stable/c/5a7090ccc242ab009ee7769e9d7fad6644dbe9bd",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: call rcu_barrier() in ksmbd_server_exit()\n\nracy issue is triggered the bug by racing between closing a connection\nand rmmod. In ksmbd, rcu_barrier() is not called at module unload time,\nso nothing prevents ksmbd from getting unloaded while it still has RCU\ncallbacks pending. It leads to trigger unintended execution of kernel\ncode locally and use to defeat protections such as Kernel Lockdown"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: el problema de la llamada a rcu_barrier() en ksmbd_server_exit() desencadena el error al acelerarse entre el cierre de una conexión y rmmod. En ksmbd, rcu_barrier() no se llama al descargar el módulo, por lo que nada impide que ksmbd se descargue mientras aún tenga devoluciones de llamada de RCU pendientes. Esto provoca la ejecución involuntaria de código del kernel localmente y se utiliza para burlar protecciones como el bloqueo del kernel."
    }
  ],
  "lastModified": "2026-08-15T13:17:39.123",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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}