CVE-2026-63899 (GCVE-0-2026-63899)
Vulnerability from cvelistv5
Published
2026-07-19 14:55
Modified
2026-07-19 14:55
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: USB: serial: mxuport: fix memory corruption with small endpoint Make sure that the bulk-out endpoint max packet size is at least eight bytes to avoid user-controlled slab corruption should a malicious device report a smaller size.
References
Impacted products
Vendor Product Version
Linux Linux Version: ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e
Version: ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e
Version: ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e
Version: ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e
Version: ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e
Version: ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e
Version: ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e
Version: ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/serial/mxuport.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "086b858b5f5125bc9d967ea2bd825f83d9f8f29d",
              "status": "affected",
              "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e",
              "versionType": "git"
            },
            {
              "lessThan": "2f3661eb2446e1ef593da45e01a3b21a906768ec",
              "status": "affected",
              "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e",
              "versionType": "git"
            },
            {
              "lessThan": "be3a1ed4ae51fa8dde57383277d336ce834f2cd9",
              "status": "affected",
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              "versionType": "git"
            },
            {
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              "status": "affected",
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            },
            {
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/serial/mxuport.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.14"
            },
            {
              "lessThan": "3.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.259",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.210",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.176",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.93",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.35",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.259",
                  "versionStartIncluding": "3.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.210",
                  "versionStartIncluding": "3.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.176",
                  "versionStartIncluding": "3.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.143",
                  "versionStartIncluding": "3.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.93",
                  "versionStartIncluding": "3.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.35",
                  "versionStartIncluding": "3.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.12",
                  "versionStartIncluding": "3.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "3.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: mxuport: fix memory corruption with small endpoint\n\nMake sure that the bulk-out endpoint max packet size is at least eight\nbytes to avoid user-controlled slab corruption should a malicious device\nreport a smaller size."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T14:55:08.116Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/086b858b5f5125bc9d967ea2bd825f83d9f8f29d"
        },
        {
          "url": "https://git.kernel.org/stable/c/2f3661eb2446e1ef593da45e01a3b21a906768ec"
        },
        {
          "url": "https://git.kernel.org/stable/c/ccbec56f2f9af008f1574335cc6a668f16603e47"
        },
        {
          "url": "https://git.kernel.org/stable/c/be3a1ed4ae51fa8dde57383277d336ce834f2cd9"
        },
        {
          "url": "https://git.kernel.org/stable/c/e906545641d34fb1a09a65b4b5cfdff40eb09681"
        },
        {
          "url": "https://git.kernel.org/stable/c/6c0cf56f00f280d72180bb6ce79741bc787a6269"
        },
        {
          "url": "https://git.kernel.org/stable/c/b40166b4ef96067620a0f248e74ad9658c8f680c"
        },
        {
          "url": "https://git.kernel.org/stable/c/4085f0dbb1ce2251c9a5938d693de6593f0ab2bd"
        }
      ],
      "title": "USB: serial: mxuport: fix memory corruption with small endpoint",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-63899",
    "datePublished": "2026-07-19T14:55:08.116Z",
    "dateReserved": "2026-07-19T07:54:57.019Z",
    "dateUpdated": "2026-07-19T14:55:08.116Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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