CVE-2026-63898 (GCVE-0-2026-63898)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-19 14:55
VLAI
Title
USB: serial: mct_u232: fix memory corruption with small endpoint
Summary
In the Linux kernel, the following vulnerability has been resolved: USB: serial: mct_u232: fix memory corruption with small endpoint The driver overrides the maximum transfer size for a specific device which only accepts 16 byte packets for its 32 byte bulk-out endpoint. Make sure to never increase the maximum transfer size to prevent slab corruption should a malicious device report a smaller endpoint max packet size than expected.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 94edbbc5fe00d03cfe1d4e690d7d2cd36317a935 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < bd2ddb3fe9052ad8703593bbec26ecc7ca92869e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 39e295a91e80f3b91f61c7ada2bde434dcaba20d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 90dbad14b109e5fdfb4934ff61e561d11ba3742d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6cb48f8890f9b2051d7c34823057296a536a31c5 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d8fdf33d6fcfb90cbec26299baf2352c84b2d768 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 57f332af1745014cd7e40414814ffaa6bc7d3b5b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 915b36d701950503c4ea0f6e314b10868e59fce3 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.259 , ≤ 5.10.* (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.94 , ≤ 6.12.* (semver)
Unaffected: 6.18.35 , ≤ 6.18.* (semver)
Unaffected: 7.0.12 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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        ],
        "id": "CVE-2026-63898",
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        "metrics": {},
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      "cve": "CVE-2026-63898",
      "id": "CVE-2026-63898",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: USB: serial: mct_u232: fix memory corruption with small endpoint",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63898.json",
      "version": "3"
    },
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      "current_release_date": "2026-09-18T00:46:44Z",
      "cve": "CVE-2026-63898",
      "id": "CVE-2026-63898",
      "initial_release_date": "2026-07-21T13:04:00Z",
      "product_status:first_fixed": "23",
      "product_status:known_affected": "335",
      "product_status:known_not_affected": "4",
      "product_status:recommended": "107",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-63898",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-63898.json",
      "version": "11"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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