{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "5.3.0"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "99428a1e7f7447955aa860f7c969273a12095b8f"
            },
            {
              "fixed": "ceef6e0ccd646aef61b907aeb9f29269d1caba50"
            }
          ],
          "repo": "https://github.com/rt-thread/rt-thread",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-843"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108952.json"
  },
  "details": "RT-Thread through 5.3.0 contains a memory corruption vulnerability in the legacy USB CDC virtual COM port driver that aliases rx_ringbuffer as a Serial V2 rt_serial_rx_fifo in _function_enable(). A connected USB host configuring the CDC device triggers writes past the ring buffer into struct vcom members and an invalid rt_free() on close, causing denial of service.",
  "id": "CVE-2026-108952",
  "modified": "2026-10-14T02:30:38.076588287Z",
  "published": "2026-10-12T12:13:04.800Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108952.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-108952"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/rt-thread-through-5.3.0-memory-corruption-via-usb-cdc-vcom-driver"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/RT-Thread/rt-thread/issues/11739"
    },
    {
      "type": "FIX",
      "url": "https://github.com/RT-Thread/rt-thread/commit/ceef6e0ccd646aef61b907aeb9f29269d1caba50"
    },
    {
      "type": "FIX",
      "url": "https://github.com/RT-Thread/rt-thread/pull/11770"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/RT-Thread/rt-thread"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/RT-Thread/rt-thread/blob/99428a1e7f7447955aa860f7c969273a12095b8f/components/legacy/usb/usbdevice/class/cdc_vcom.c#L518"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "RT-Thread through 5.3.0 Memory Corruption via USB CDC VCOM Driver"
}