fkie_cve-2025-23155
Vulnerability from fkie_nvd
Published
2025-05-01 13:15
Modified
2025-11-05 15:31
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: 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/442312c2a90d60c7a5197246583fa91d9e579985Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9e51a6a44e2c4de780a26e8fe110d708e806a8cdPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c60d101a226f18e9a8f01bb4c6ca2b47dfcb15efPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e148266e104fce396ad624079a6812ac3a9982efPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "573B9A24-9753-4B70-B2CD-DC8874B067AC",
              "versionEndExcluding": "6.12.36",
              "versionStartIncluding": "5.13",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4A475784-BF3B-4514-81EE-49C8522FB24A",
              "versionEndExcluding": "6.13.12",
              "versionStartIncluding": "6.13",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "483E2E15-2135-4EC6-AB64-16282C5EF704",
              "versionEndExcluding": "6.14.3",
              "versionStartIncluding": "6.14",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "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": "2025-11-05T15:31:55.310",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "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"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-05-01T13:15:51.413",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/442312c2a90d60c7a5197246583fa91d9e579985"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/9e51a6a44e2c4de780a26e8fe110d708e806a8cd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/c60d101a226f18e9a8f01bb4c6ca2b47dfcb15ef"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/e148266e104fce396ad624079a6812ac3a9982ef"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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