CVE-2026-63961 (GCVE-0-2026-63961)
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: altmodes/displayport: validate count before reading Status Update VDO A broken/malicious device can send the incorrect count for a status update VDO, which will cause the kernel to read uninitialized stack data and send it off elsewhere. Fix this up by correctly verifying the count for the update object.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588
Version: 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588
Version: 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588
Version: 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588
Version: 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588
Version: 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588
Version: 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588
Version: 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/typec/altmodes/displayport.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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          "product": "Linux",
          "programFiles": [
            "drivers/usb/typec/altmodes/displayport.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.19"
            },
            {
              "lessThan": "4.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.259",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
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            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.176",
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            },
            {
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              "status": "unaffected",
              "version": "6.6.143",
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            },
            {
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              "status": "unaffected",
              "version": "6.12.93",
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            },
            {
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              "status": "unaffected",
              "version": "6.18.35",
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            },
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              "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": "4.19",
                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.210",
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                  "vulnerable": true
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: altmodes/displayport: validate count before reading Status Update VDO\n\nA broken/malicious device can send the incorrect count for a status\nupdate VDO, which will cause the kernel to read uninitialized stack data\nand send it off elsewhere.\n\nFix this up by correctly verifying the count for the update object."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-20T06:41:41.563Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/74aabe9ea30fdfba924fce9594e6aa69a596a4bb"
        },
        {
          "url": "https://git.kernel.org/stable/c/dd7118c010f324497c275e8fd7a35c9baaa2a00f"
        },
        {
          "url": "https://git.kernel.org/stable/c/6ffdbcd7a02f3af8fff9b6519830369f574ed44c"
        },
        {
          "url": "https://git.kernel.org/stable/c/70e7045849e954e56dcbf441b6330e66bc996306"
        },
        {
          "url": "https://git.kernel.org/stable/c/64bd6ccc5799f8473d1f37d4d8f53093dfec5c02"
        },
        {
          "url": "https://git.kernel.org/stable/c/b10eff5abe6aa2a5af10ed17bddff76e3b6e6b9b"
        },
        {
          "url": "https://git.kernel.org/stable/c/77a759ec30bc5fb0dd9c867b711d0acfed6c7faa"
        },
        {
          "url": "https://git.kernel.org/stable/c/8a18f896e667df491331371b55d4ad644dc51d60"
        }
      ],
      "title": "usb: typec: altmodes/displayport: validate count before reading Status Update VDO",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-63961",
    "datePublished": "2026-07-19T14:55:50.993Z",
    "dateReserved": "2026-07-19T07:54:57.023Z",
    "dateUpdated": "2026-07-20T06:41:41.563Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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