{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"
            },
            {
              "fixed": "94edbbc5fe00d03cfe1d4e690d7d2cd36317a935"
            },
            {
              "fixed": "bd2ddb3fe9052ad8703593bbec26ecc7ca92869e"
            },
            {
              "fixed": "39e295a91e80f3b91f61c7ada2bde434dcaba20d"
            },
            {
              "fixed": "90dbad14b109e5fdfb4934ff61e561d11ba3742d"
            },
            {
              "fixed": "6cb48f8890f9b2051d7c34823057296a536a31c5"
            },
            {
              "fixed": "d8fdf33d6fcfb90cbec26299baf2352c84b2d768"
            },
            {
              "fixed": "57f332af1745014cd7e40414814ffaa6bc7d3b5b"
            },
            {
              "fixed": "915b36d701950503c4ea0f6e314b10868e59fce3"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.12"
            },
            {
              "fixed": "5.10.259"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.210"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.176"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.143"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.94"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.35"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63898.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: mct_u232: fix memory corruption with small endpoint\n\nThe driver overrides the maximum transfer size for a specific device\nwhich only accepts 16 byte packets for its 32 byte bulk-out endpoint.\n\nMake sure to never increase the maximum transfer size to prevent slab\ncorruption should a malicious device report a smaller endpoint max\npacket size than expected.",
  "id": "CVE-2026-63898",
  "modified": "2026-07-21T03:41:56.060340942Z",
  "published": "2026-07-19T14:55:07.452Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/39e295a91e80f3b91f61c7ada2bde434dcaba20d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/57f332af1745014cd7e40414814ffaa6bc7d3b5b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6cb48f8890f9b2051d7c34823057296a536a31c5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/90dbad14b109e5fdfb4934ff61e561d11ba3742d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/915b36d701950503c4ea0f6e314b10868e59fce3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/94edbbc5fe00d03cfe1d4e690d7d2cd36317a935"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bd2ddb3fe9052ad8703593bbec26ecc7ca92869e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d8fdf33d6fcfb90cbec26299baf2352c84b2d768"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63898.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63898"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "USB: serial: mct_u232: fix memory corruption with small endpoint"
}