CVE-2025-71108 (GCVE-0-2025-71108)
Vulnerability from cvelistv5
Published
2026-01-14 15:05
Modified
2026-02-09 08:35
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: Handle incorrect num_connectors capability The UCSI spec states that the num_connectors field is 7 bits, and the 8th bit is reserved and should be set to zero. Some buggy FW has been known to set this bit, and it can lead to a system not booting. Flag that the FW is not behaving correctly, and auto-fix the value so that the system boots correctly. Found on Lenovo P1 G8 during Linux enablement program. The FW will be fixed, but seemed worth addressing in case it hit platforms that aren't officially Linux supported.
References
Impacted products
Vendor Product Version
Linux Linux Version: c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f
Version: c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f
Version: c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f
Version: c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f
Version: c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f
Version: c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f
Version: c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/typec/ucsi/ucsi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "07c8d2a109d847775b3b4e2c3294c8e1eea75432",
              "status": "affected",
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
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              "version": "c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/typec/ucsi/ucsi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.13"
            },
            {
              "lessThan": "4.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.248",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.198",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.120",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.64",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.248",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.198",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.160",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.120",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.64",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.3",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: Handle incorrect num_connectors capability\n\nThe UCSI spec states that the num_connectors field is 7 bits, and the\n8th bit is reserved and should be set to zero.\nSome buggy FW has been known to set this bit, and it can lead to a\nsystem not booting.\nFlag that the FW is not behaving correctly, and auto-fix the value\nso that the system boots correctly.\n\nFound on Lenovo P1 G8 during Linux enablement program. The FW will\nbe fixed, but seemed worth addressing in case it hit platforms that\naren\u0027t officially Linux supported."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-09T08:35:02.075Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/07c8d2a109d847775b3b4e2c3294c8e1eea75432"
        },
        {
          "url": "https://git.kernel.org/stable/c/58941bbb0050e365a98c64f1fc4a9a0ac127dba6"
        },
        {
          "url": "https://git.kernel.org/stable/c/f72f97d0aee4a993a35f2496bca5efd24827235d"
        },
        {
          "url": "https://git.kernel.org/stable/c/914605b0de8128434eafc9582445306830748b93"
        },
        {
          "url": "https://git.kernel.org/stable/c/3042a57a8e8bce4a3100c3f6f03dc372aab24943"
        },
        {
          "url": "https://git.kernel.org/stable/c/132fe187e0d940f388f839fe2cde9b84106ad20d"
        },
        {
          "url": "https://git.kernel.org/stable/c/30cd2cb1abf4c4acdb1ddb468c946f68939819fb"
        }
      ],
      "title": "usb: typec: ucsi: Handle incorrect num_connectors capability",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71108",
    "datePublished": "2026-01-14T15:05:56.553Z",
    "dateReserved": "2026-01-13T15:30:19.652Z",
    "dateUpdated": "2026-02-09T08:35:02.075Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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