{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-23155",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-23155"
  ],
  "published": "2025-05-01T13:03:03Z",
  "summary": "net: stmmac: Fix accessing freed irq affinity_hint",
  "details": "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->affinity_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.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.164",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-23155"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2fbf67ddb8a0d0efc00d2df496a9843ec318d48b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/960dab23f6d405740c537d095f90a4ee9ddd9285"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/442312c2a90d60c7a5197246583fa91d9e579985"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e148266e104fce396ad624079a6812ac3a9982ef"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9e51a6a44e2c4de780a26e8fe110d708e806a8cd"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c60d101a226f18e9a8f01bb4c6ca2b47dfcb15ef"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T12:19:11Z"
  }
}