CVE-2025-68343 (GCVE-0-2025-68343)

Vulnerability from cvelistv5 – Published: 2025-12-23 13:58 – Updated: 2025-12-23 13:58
VLAI?
Title
can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing header
Summary
In the Linux kernel, the following vulnerability has been resolved: can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing header The driver expects to receive a struct gs_host_frame in gs_usb_receive_bulk_callback(). Use struct_group to describe the header of the struct gs_host_frame and check that we have at least received the header before accessing any members of it. To resubmit the URB, do not dereference the pointer chain "dev->parent->hf_size_rx" but use "parent->hf_size_rx" instead. Since "urb->context" contains "parent", it is always defined, while "dev" is not defined if the URB it too short.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d08e973a77d128b25e01a08c34d89593fdf222da , < 18cbce43363c9f84b90a92d57df341155eee0697 (git)
Affected: d08e973a77d128b25e01a08c34d89593fdf222da , < 3433680b759646efcacc64fe36aa2e51ae34b8f0 (git)
Affected: d08e973a77d128b25e01a08c34d89593fdf222da , < 616eee3e895b8ca0028163fcb1dce5e3e9dea322 (git)
Affected: d08e973a77d128b25e01a08c34d89593fdf222da , < f31693dc3a584c0ad3937e857b59dbc1a7ed2b87 (git)
Affected: d08e973a77d128b25e01a08c34d89593fdf222da , < 6fe9f3279f7d2518439a7962c5870c6e9ecbadcf (git)
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    Linux Linux Affected: 3.16
Unaffected: 0 , < 3.16 (semver)
Unaffected: 6.1.159 , ≤ 6.1.* (semver)
Unaffected: 6.6.119 , ≤ 6.6.* (semver)
Unaffected: 6.12.61 , ≤ 6.12.* (semver)
Unaffected: 6.17.11 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/can/usb/gs_usb.c"
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          "vendor": "Linux",
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              "status": "unaffected",
              "version": "6.12.61",
              "versionType": "semver"
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              "version": "6.17.11",
              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
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        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "operator": "OR"
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing header\n\nThe driver expects to receive a struct gs_host_frame in\ngs_usb_receive_bulk_callback().\n\nUse struct_group to describe the header of the struct gs_host_frame and\ncheck that we have at least received the header before accessing any\nmembers of it.\n\nTo resubmit the URB, do not dereference the pointer chain\n\"dev-\u003eparent-\u003ehf_size_rx\" but use \"parent-\u003ehf_size_rx\" instead. Since\n\"urb-\u003econtext\" contains \"parent\", it is always defined, while \"dev\" is not\ndefined if the URB it too short."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-23T13:58:28.411Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/18cbce43363c9f84b90a92d57df341155eee0697"
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        },
        {
          "url": "https://git.kernel.org/stable/c/6fe9f3279f7d2518439a7962c5870c6e9ecbadcf"
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      ],
      "title": "can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing header",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68343",
    "datePublished": "2025-12-23T13:58:28.411Z",
    "dateReserved": "2025-12-16T14:48:05.298Z",
    "dateUpdated": "2025-12-23T13:58:28.411Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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  "vulnerability-lookup:meta": {
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  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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