CVE-2023-53840 (GCVE-0-2023-53840)
Vulnerability from cvelistv5
Published
2025-12-09 01:29
Modified
2025-12-09 01:29
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: early: xhci-dbc: Fix a potential out-of-bound memory access If xdbc_bulk_write() fails, the values in 'buf' can be anything. So the string is not guaranteed to be NULL terminated when xdbc_trace() is called. Reserve an extra byte, which will be zeroed automatically because 'buf' is a static variable, in order to avoid troubles, should it happen.
References
Impacted products
Vendor Product Version
Linux Linux Version: aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0
Version: aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0
Version: aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0
Version: aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/early/xhci-dbc.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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        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/early/xhci-dbc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.12"
            },
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              "lessThan": "4.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "5.15.99",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.1.16",
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.99",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: early: xhci-dbc: Fix a potential out-of-bound memory access\n\nIf xdbc_bulk_write() fails, the values in \u0027buf\u0027 can be anything. So the\nstring is not guaranteed to be NULL terminated when xdbc_trace() is called.\n\nReserve an extra byte, which will be zeroed automatically because \u0027buf\u0027 is\na static variable, in order to avoid troubles, should it happen."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-09T01:29:56.848Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e8fb0f13e45cf361fd06593d3cb2d89915cd3bd0"
        },
        {
          "url": "https://git.kernel.org/stable/c/351c8d8650d1ccc006255fa01f98b6c6496a02e5"
        },
        {
          "url": "https://git.kernel.org/stable/c/df7c8aba7309f4dc55df94e06b67f576c0f52406"
        },
        {
          "url": "https://git.kernel.org/stable/c/a4a97ab3db5c081eb6e7dba91306adefb461e0bd"
        }
      ],
      "title": "usb: early: xhci-dbc: Fix a potential out-of-bound memory access",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53840",
    "datePublished": "2025-12-09T01:29:56.848Z",
    "dateReserved": "2025-12-09T01:27:17.826Z",
    "dateUpdated": "2025-12-09T01:29:56.848Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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