CVE-2026-63959 (GCVE-0-2026-63959)
Vulnerability from cvelistv5
Published
2026-07-19 14:55
Modified
2026-07-20 06:41
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpm/tcpci_maxim: validate header NDO against RX_BYTE_CNT A broken/malicious port can transmit a CRC-valid frame whose header advertises up to seven data objects but whose body carries fewer than that. Check for this, and rightfully reject the message, instead of reading from uninitialized stack memory.
References
Impacted products
Vendor Product Version
Linux Linux Version: 6f413b559f86a2894188e082e389ff95ee428345
Version: 6f413b559f86a2894188e082e389ff95ee428345
Version: 6f413b559f86a2894188e082e389ff95ee428345
Version: 6f413b559f86a2894188e082e389ff95ee428345
Version: 6f413b559f86a2894188e082e389ff95ee428345
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/typec/tcpm/tcpci_maxim_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0af00f1459f5dd757f0d392f8caa38039561ac62",
              "status": "affected",
              "version": "6f413b559f86a2894188e082e389ff95ee428345",
              "versionType": "git"
            },
            {
              "lessThan": "dc17721d42e6d89f63572e63add8306a0e15eb3c",
              "status": "affected",
              "version": "6f413b559f86a2894188e082e389ff95ee428345",
              "versionType": "git"
            },
            {
              "lessThan": "9b496e3371c04f0a03b7faa5d2442536d00e3998",
              "status": "affected",
              "version": "6f413b559f86a2894188e082e389ff95ee428345",
              "versionType": "git"
            },
            {
              "lessThan": "c4ab8e2d4432abb646c5c0687f8dab173da901f9",
              "status": "affected",
              "version": "6f413b559f86a2894188e082e389ff95ee428345",
              "versionType": "git"
            },
            {
              "lessThan": "aa2f716327be1818e1cb156da8a2844804aaec2f",
              "status": "affected",
              "version": "6f413b559f86a2894188e082e389ff95ee428345",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/typec/tcpm/tcpci_maxim_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.10"
            },
            {
              "lessThan": "5.10",
              "status": "unaffected",
              "version": "0",
              "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": "6.6.143",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.93",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.35",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.12",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: tcpm/tcpci_maxim: validate header NDO against RX_BYTE_CNT\n\nA broken/malicious port can transmit a CRC-valid frame whose header\nadvertises up to seven data objects but whose body carries fewer than\nthat.  Check for this, and rightfully reject the message, instead of\nreading from uninitialized stack memory."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-20T06:41:39.202Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0af00f1459f5dd757f0d392f8caa38039561ac62"
        },
        {
          "url": "https://git.kernel.org/stable/c/dc17721d42e6d89f63572e63add8306a0e15eb3c"
        },
        {
          "url": "https://git.kernel.org/stable/c/9b496e3371c04f0a03b7faa5d2442536d00e3998"
        },
        {
          "url": "https://git.kernel.org/stable/c/c4ab8e2d4432abb646c5c0687f8dab173da901f9"
        },
        {
          "url": "https://git.kernel.org/stable/c/aa2f716327be1818e1cb156da8a2844804aaec2f"
        }
      ],
      "title": "usb: typec: tcpm/tcpci_maxim: validate header NDO against RX_BYTE_CNT",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-63959",
    "datePublished": "2026-07-19T14:55:49.553Z",
    "dateReserved": "2026-07-19T07:54:57.023Z",
    "dateUpdated": "2026-07-20T06:41:39.202Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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