net: lan743x: fix potential out-of-bounds write in lan743x_ptp_io_event_clock_get()

{
  "id": "bdbbd9b12f32fb5dd06ea950bb4cf4721444451994198ab835f95d1b558a3b1b",
  "url": "https://osv.dev/vulnerability/CVE-2025-38183",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: lan743x: fix potential out-of-bounds write in lan743x_ptp_io_event_clock_get()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net: lan743x: fix potential out-of-bounds write in lan743x_ptp_io_event_clock_get() Before calling lan743x_ptp_io_event_clock_get(), the 'channel' value is checked against the maximum value of PCI11X1X_PTP_IO_MAX_CHANNELS(8). This seems correct and aligns with the PTP interrupt status register (PTP_INT_STS) specifications. However, lan743x_ptp_io_event_clock_get() writes to ptp->extts[] with only LAN743X_PTP_N_EXTTS(4) elements, using channel as an index: lan743x_ptp_io_event_clock_get(..., u8 channel,...) { ... /* Update Local timestamp */ extts = &ptp->extts[channel]; extts->ts.tv_sec = sec; ... } To avoid an out-of-bounds write and utilize all the supported GPIO inputs, set LAN743X_PTP_N_EXTTS to 8. Detected using the static analysis tool - Svace.",
    "evidence": "osv:CVE-2025-38183",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.142",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.95",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.35",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.15.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-38183",
      "aliases": [
        "CVE-2025-38183"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "60942c397af6094c04406b77982314dfe69ef3c4"
                },
                {
                  "fixed": "e8d48201a132f4aab31351c19a802c5a5ae820fa"
                },
                {
                  "fixed": "66bba1fd5bad548c03f7e42669a59f3f4d8211cc"
                },
                {
                  "fixed": "41017bd66c533f7af912c58273c7dfd5de0065d4"
                },
                {
                  "fixed": "4da0d23516857230b8e9b3022e25422ee2e2ba80"
                },
                {
                  "fixed": "e353b0854d3a1a31cb061df8d022fbfea53a0f24"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38183.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.18.0"
                },
                {
                  "fixed": "6.1.142"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
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                {
                  "fixed": "6.6.95"
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            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
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                {
                  "fixed": "6.12.35"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.15.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38183.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:40.457395715Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/41017bd66c533f7af912c58273c7dfd5de0065d4",
        "https://git.kernel.org/stable/c/4da0d23516857230b8e9b3022e25422ee2e2ba80",
        "https://git.kernel.org/stable/c/66bba1fd5bad548c03f7e42669a59f3f4d8211cc",
        "https://git.kernel.org/stable/c/e353b0854d3a1a31cb061df8d022fbfea53a0f24",
        "https://git.kernel.org/stable/c/e8d48201a132f4aab31351c19a802c5a5ae820fa",
        "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38183.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-38183",
        "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/2025/38xxx/CVE-2025-38183.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-38183",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 507842,
  "published_at": "2025-07-04T13:37:10.253+00:00"
}