net: stmmac: Fix accessing freed irq affinity_hint

{
  "id": "8d04760ae2804dc1daf36d943cc9ba50dc0b83c26f635369bad96be78a2e215e",
  "url": "https://osv.dev/vulnerability/CVE-2025-23155",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: stmmac: Fix accessing freed irq affinity_hint",
    "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.",
    "evidence": "osv:CVE-2025-23155",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.164",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.117",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.36",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.13.12",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.14.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-23155",
      "aliases": [
        "CVE-2025-23155"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "8deec94c6040bb4a767f6e9456a0a44c7f2e713e"
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                {
                  "fixed": "2fbf67ddb8a0d0efc00d2df496a9843ec318d48b"
                },
                {
                  "fixed": "960dab23f6d405740c537d095f90a4ee9ddd9285"
                },
                {
                  "fixed": "442312c2a90d60c7a5197246583fa91d9e579985"
                },
                {
                  "fixed": "e148266e104fce396ad624079a6812ac3a9982ef"
                },
                {
                  "fixed": "9e51a6a44e2c4de780a26e8fe110d708e806a8cd"
                },
                {
                  "fixed": "c60d101a226f18e9a8f01bb4c6ca2b47dfcb15ef"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-23155.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.13.0"
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                {
                  "fixed": "6.1.164"
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              ]
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            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.2.0"
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                {
                  "fixed": "6.6.117"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.36"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.13.12"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.14.0"
                },
                {
                  "fixed": "6.14.3"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-23155.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:22.321641371Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2fbf67ddb8a0d0efc00d2df496a9843ec318d48b",
        "https://git.kernel.org/stable/c/442312c2a90d60c7a5197246583fa91d9e579985",
        "https://git.kernel.org/stable/c/960dab23f6d405740c537d095f90a4ee9ddd9285",
        "https://git.kernel.org/stable/c/9e51a6a44e2c4de780a26e8fe110d708e806a8cd",
        "https://git.kernel.org/stable/c/c60d101a226f18e9a8f01bb4c6ca2b47dfcb15ef",
        "https://git.kernel.org/stable/c/e148266e104fce396ad624079a6812ac3a9982ef",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/23xxx/CVE-2025-23155.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-23155",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/23xxx/CVE-2025-23155.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-23155",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 488432,
  "published_at": "2025-05-01T12:55:41.607+00:00"
}