CVE-2026-23080 (GCVE-0-2026-23080)

Vulnerability from cvelistv5 – Published: 2026-02-04 16:08 – Updated: 2026-02-09 08:38
VLAI?
Title
can: mcba_usb: mcba_usb_read_bulk_callback(): fix URB memory leak
Summary
In the Linux kernel, the following vulnerability has been resolved: can: mcba_usb: mcba_usb_read_bulk_callback(): fix URB memory leak Fix similar memory leak as in commit 7352e1d5932a ("can: gs_usb: gs_usb_receive_bulk_callback(): fix URB memory leak"). In mcba_usb_probe() -> mcba_usb_start(), the URBs for USB-in transfers are allocated, added to the priv->rx_submitted anchor and submitted. In the complete callback mcba_usb_read_bulk_callback(), the URBs are processed and resubmitted. In mcba_usb_close() -> mcba_urb_unlink() the URBs are freed by calling usb_kill_anchored_urbs(&priv->rx_submitted). However, this does not take into account that the USB framework unanchors the URB before the complete function is called. This means that once an in-URB has been completed, it is no longer anchored and is ultimately not released in usb_kill_anchored_urbs(). Fix the memory leak by anchoring the URB in the mcba_usb_read_bulk_callback()to the priv->rx_submitted anchor.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 51f3baad7de943780ce0c17bd7975df567dd6e14 , < 8b34c611a4feb81921bc4728c091e4e3ba0270c0 (git)
Affected: 51f3baad7de943780ce0c17bd7975df567dd6e14 , < b5a1ccdc63b71d93a69a6b72f7a3f3934293ea60 (git)
Affected: 51f3baad7de943780ce0c17bd7975df567dd6e14 , < 59153b6388e05609144ad56a9b354e9100a91983 (git)
Affected: 51f3baad7de943780ce0c17bd7975df567dd6e14 , < 179f6f0cf5ae489743273b7c1644324c0c477ea9 (git)
Affected: 51f3baad7de943780ce0c17bd7975df567dd6e14 , < 94c9f6f7b953f6382fef4bdc48c046b861b8868f (git)
Affected: 51f3baad7de943780ce0c17bd7975df567dd6e14 , < d374d715e338dfc3804aaa006fa6e470ffebb264 (git)
Affected: 51f3baad7de943780ce0c17bd7975df567dd6e14 , < 710a7529fb13c5a470258ff5508ed3c498d54729 (git)
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    Linux Linux Affected: 4.12
Unaffected: 0 , < 4.12 (semver)
Unaffected: 5.10.249 , ≤ 5.10.* (semver)
Unaffected: 5.15.199 , ≤ 5.15.* (semver)
Unaffected: 6.1.162 , ≤ 6.1.* (semver)
Unaffected: 6.6.122 , ≤ 6.6.* (semver)
Unaffected: 6.12.68 , ≤ 6.12.* (semver)
Unaffected: 6.18.8 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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{
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/can/usb/mcba_usb.c"
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          "vendor": "Linux",
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              "version": "6.1.162",
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              "status": "unaffected",
              "version": "6.18.8",
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              "lessThanOrEqual": "*",
              "status": "unaffected",
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      ],
      "cpeApplicability": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: mcba_usb: mcba_usb_read_bulk_callback(): fix URB memory leak\n\nFix similar memory leak as in commit 7352e1d5932a (\"can: gs_usb:\ngs_usb_receive_bulk_callback(): fix URB memory leak\").\n\nIn mcba_usb_probe() -\u003e mcba_usb_start(), the URBs for USB-in transfers are\nallocated, added to the priv-\u003erx_submitted anchor and submitted. In the\ncomplete callback mcba_usb_read_bulk_callback(), the URBs are processed and\nresubmitted. In mcba_usb_close() -\u003e mcba_urb_unlink() the URBs are freed by\ncalling usb_kill_anchored_urbs(\u0026priv-\u003erx_submitted).\n\nHowever, this does not take into account that the USB framework unanchors\nthe URB before the complete function is called. This means that once an\nin-URB has been completed, it is no longer anchored and is ultimately not\nreleased in usb_kill_anchored_urbs().\n\nFix the memory leak by anchoring the URB in the\nmcba_usb_read_bulk_callback()to the priv-\u003erx_submitted anchor."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-09T08:38:19.968Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/8b34c611a4feb81921bc4728c091e4e3ba0270c0"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23080",
    "datePublished": "2026-02-04T16:08:04.982Z",
    "dateReserved": "2026-01-13T15:37:45.959Z",
    "dateUpdated": "2026-02-09T08:38:19.968Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23080\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-04T17:16:18.750\",\"lastModified\":\"2026-02-06T17:16:23.707\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncan: mcba_usb: mcba_usb_read_bulk_callback(): fix URB memory leak\\n\\nFix similar memory leak as in commit 7352e1d5932a (\\\"can: gs_usb:\\ngs_usb_receive_bulk_callback(): fix URB memory leak\\\").\\n\\nIn mcba_usb_probe() -\u003e mcba_usb_start(), the URBs for USB-in transfers are\\nallocated, added to the priv-\u003erx_submitted anchor and submitted. In the\\ncomplete callback mcba_usb_read_bulk_callback(), the URBs are processed and\\nresubmitted. In mcba_usb_close() -\u003e mcba_urb_unlink() the URBs are freed by\\ncalling usb_kill_anchored_urbs(\u0026priv-\u003erx_submitted).\\n\\nHowever, this does not take into account that the USB framework unanchors\\nthe URB before the complete function is called. This means that once an\\nin-URB has been completed, it is no longer anchored and is ultimately not\\nreleased in usb_kill_anchored_urbs().\\n\\nFix the memory leak by anchoring the URB in the\\nmcba_usb_read_bulk_callback()to the priv-\u003erx_submitted anchor.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/179f6f0cf5ae489743273b7c1644324c0c477ea9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/59153b6388e05609144ad56a9b354e9100a91983\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/710a7529fb13c5a470258ff5508ed3c498d54729\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8b34c611a4feb81921bc4728c091e4e3ba0270c0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/94c9f6f7b953f6382fef4bdc48c046b861b8868f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b5a1ccdc63b71d93a69a6b72f7a3f3934293ea60\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d374d715e338dfc3804aaa006fa6e470ffebb264\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • 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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