fkie_cve-2025-23155
Vulnerability from fkie_nvd
Published
2025-05-01 13:15
Modified
2025-09-29 11:15
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net: stmmac: Fix accessing freed irq affinity_hint In stmmac_request_irq_multi_msi(), a pointer to the stack variable cpu_mask is passed to irq_set_affinity_hint(). This value is stored in irq_desc->affinity_hint, but once stmmac_request_irq_multi_msi() returns, the pointer becomes dangling. The affinity_hint is exposed via procfs with S_IRUGO permissions, allowing any unprivileged process to read it. Accessing this stale pointer can lead to: - a kernel oops or panic if the referenced memory has been released and unmapped, or - leakage of kernel data into userspace if the memory is re-used for other purposes. All platforms that use stmmac with PCI MSI (Intel, Loongson, etc) are affected.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/442312c2a90d60c7a5197246583fa91d9e579985
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9e51a6a44e2c4de780a26e8fe110d708e806a8cd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c60d101a226f18e9a8f01bb4c6ca2b47dfcb15ef
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e148266e104fce396ad624079a6812ac3a9982ef
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: Fix accessing freed irq affinity_hint\n\nIn stmmac_request_irq_multi_msi(), a pointer to the stack variable\ncpu_mask is passed to irq_set_affinity_hint(). This value is stored in\nirq_desc-\u003eaffinity_hint, but once stmmac_request_irq_multi_msi()\nreturns, the pointer becomes dangling.\n\nThe affinity_hint is exposed via procfs with S_IRUGO permissions,\nallowing any unprivileged process to read it. Accessing this stale\npointer can lead to:\n\n- a kernel oops or panic if the referenced memory has been released and\n  unmapped, or\n- leakage of kernel data into userspace if the memory is re-used for\n  other purposes.\n\nAll platforms that use stmmac with PCI MSI (Intel, Loongson, etc) are\naffected."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: stmmac: Se corrige el acceso a la IRQ liberada affinity_hint. La m\u00e1scara cpu no debe ser una variable local, ya que su puntero se guarda en irq_desc y se puede acceder desde procfs. Para corregirla, utilice la m\u00e1scara persistente cpumask_of(cpu#)."
    }
  ],
  "id": "CVE-2025-23155",
  "lastModified": "2025-09-29T11:15:47.327",
  "metrics": {},
  "published": "2025-05-01T13:15:51.413",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/442312c2a90d60c7a5197246583fa91d9e579985"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9e51a6a44e2c4de780a26e8fe110d708e806a8cd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c60d101a226f18e9a8f01bb4c6ca2b47dfcb15ef"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e148266e104fce396ad624079a6812ac3a9982ef"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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