{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"
            },
            {
              "fixed": "f1617539ab90e67da788959bfd314076f093a11a"
            },
            {
              "fixed": "f361359a952da15e70e693c2d7dca5c5843eae3e"
            },
            {
              "fixed": "37e54d1b986df35c936d81e5b59a7aa3ec6938f0"
            },
            {
              "fixed": "ffb739a49186ea784bbd9cb91b647f062395b419"
            },
            {
              "fixed": "6a4602221cba7a738442328d66a2f0b1c9bf6e17"
            },
            {
              "fixed": "22823a319fb2afdf02cacafbed8b613b757efbc8"
            },
            {
              "fixed": "db1e7eb6203d534dad64cac2c793b69e561e657b"
            },
            {
              "fixed": "4ce058df2ee02cc2a0f0fd5cd64ce6f1482a0b65"
            }
          ],
          "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": "6.12.93"
            }
          ],
          "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-2026-63903.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: belkin_sa: validate interrupt status length\n\nThe Belkin interrupt callback treats interrupt data as a four-byte\nstatus report and reads LSR/MSR fields at offsets 2 and 3. The\ninterrupt-in buffer length is derived from endpoint wMaxPacketSize, and\nshort interrupt transfers may complete successfully with a smaller\nactual_length.\n\nCheck the completed interrupt packet length before parsing status\nfields so short interrupt endpoints and short successful packets are\nignored instead of causing out-of-bounds or stale status-byte reads.\n\nKASAN report as below:\n\nBUG: KASAN: slab-out-of-bounds in belkin_sa_read_int_callback()\nRead of size 1\nCall trace:\n  belkin_sa_read_int_callback() (drivers/usb/serial/belkin_sa.c:202)\n  __usb_hcd_giveback_urb() (drivers/usb/core/hcd.c:1630)\n  dummy_timer() (?:?)",
  "id": "CVE-2026-63903",
  "modified": "2026-07-21T03:41:57.465140644Z",
  "published": "2026-07-19T14:55:10.905Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/22823a319fb2afdf02cacafbed8b613b757efbc8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/37e54d1b986df35c936d81e5b59a7aa3ec6938f0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ce058df2ee02cc2a0f0fd5cd64ce6f1482a0b65"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6a4602221cba7a738442328d66a2f0b1c9bf6e17"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/db1e7eb6203d534dad64cac2c793b69e561e657b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f1617539ab90e67da788959bfd314076f093a11a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f361359a952da15e70e693c2d7dca5c5843eae3e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ffb739a49186ea784bbd9cb91b647f062395b419"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63903.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63903"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "USB: serial: belkin_sa: validate interrupt status length"
}