CVE-2025-38391 (GCVE-0-2025-38391)
Vulnerability from cvelistv5
Published
2025-07-25 12:53
Modified
2025-07-28 04:20
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: typec: altmodes/displayport: do not index invalid pin_assignments A poorly implemented DisplayPort Alt Mode port partner can indicate that its pin assignment capabilities are greater than the maximum value, DP_PIN_ASSIGN_F. In this case, calls to pin_assignment_show will cause a BRK exception due to an out of bounds array access. Prevent for loop in pin_assignment_show from accessing invalid values in pin_assignments by adding DP_PIN_ASSIGN_MAX value in typec_dp.h and using i < DP_PIN_ASSIGN_MAX as a loop condition.
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": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/typec/altmodes/displayport.c",
            "include/linux/usb/typec_dp.h"
          ],
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            "include/linux/usb/typec_dp.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "status": "unaffected",
              "version": "0",
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              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: altmodes/displayport: do not index invalid pin_assignments\n\nA poorly implemented DisplayPort Alt Mode port partner can indicate\nthat its pin assignment capabilities are greater than the maximum\nvalue, DP_PIN_ASSIGN_F. In this case, calls to pin_assignment_show\nwill cause a BRK exception due to an out of bounds array access.\n\nPrevent for loop in pin_assignment_show from accessing\ninvalid values in pin_assignments by adding DP_PIN_ASSIGN_MAX\nvalue in typec_dp.h and using i \u003c DP_PIN_ASSIGN_MAX as a loop\ncondition."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:20:54.635Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c93bc959788ed9a1af7df57cb539837bdf790cee"
        },
        {
          "url": "https://git.kernel.org/stable/c/114a977e0f6bf278e05eade055e13fc271f69cf7"
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          "url": "https://git.kernel.org/stable/c/621d5a3ef0231ab242f2d31eecec40c38ca609c5"
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        },
        {
          "url": "https://git.kernel.org/stable/c/af4db5a35a4ef7a68046883bfd12468007db38f1"
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      ],
      "title": "usb: typec: altmodes/displayport: do not index invalid pin_assignments",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38391",
    "datePublished": "2025-07-25T12:53:31.223Z",
    "dateReserved": "2025-04-16T04:51:24.011Z",
    "dateUpdated": "2025-07-28T04:20:54.635Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38391\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-25T13:15:28.487\",\"lastModified\":\"2025-07-25T15:29:19.837\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nusb: typec: altmodes/displayport: do not index invalid pin_assignments\\n\\nA poorly implemented DisplayPort Alt Mode port partner can indicate\\nthat its pin assignment capabilities are greater than the maximum\\nvalue, DP_PIN_ASSIGN_F. In this case, calls to pin_assignment_show\\nwill cause a BRK exception due to an out of bounds array access.\\n\\nPrevent for loop in pin_assignment_show from accessing\\ninvalid values in pin_assignments by adding DP_PIN_ASSIGN_MAX\\nvalue in typec_dp.h and using i \u003c DP_PIN_ASSIGN_MAX as a loop\\ncondition.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/114a977e0f6bf278e05eade055e13fc271f69cf7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2f535517b5611b7221ed478527e4b58e29536ddf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/45e9444b3b97eaf51a5024f1fea92f44f39b50c6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/47cb5d26f61d80c805d7de4106451153779297a1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5581e694d3a1c2f32c5a51d745c55b107644e1f8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/621d5a3ef0231ab242f2d31eecec40c38ca609c5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/af4db5a35a4ef7a68046883bfd12468007db38f1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c93bc959788ed9a1af7df57cb539837bdf790cee\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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