CVE-2026-23061 (GCVE-0-2026-23061)

Vulnerability from cvelistv5 – Published: 2026-02-04 16:07 – Updated: 2026-02-09 08:37
VLAI?
Title
can: kvaser_usb: kvaser_usb_read_bulk_callback(): fix URB memory leak
Summary
In the Linux kernel, the following vulnerability has been resolved: can: kvaser_usb: kvaser_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 kvaser_usb_set_{,data_}bittiming() -> kvaser_usb_setup_rx_urbs(), the URBs for USB-in transfers are allocated, added to the dev->rx_submitted anchor and submitted. In the complete callback kvaser_usb_read_bulk_callback(), the URBs are processed and resubmitted. In kvaser_usb_remove_interfaces() the URBs are freed by calling usb_kill_anchored_urbs(&dev->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 kvaser_usb_read_bulk_callback() to the dev->rx_submitted anchor.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 080f40a6fa28dab299da7a652e444b1e2d9231e7 , < d9d824582f2ec76459ffab449e9b05c7bc49645c (git)
Affected: 080f40a6fa28dab299da7a652e444b1e2d9231e7 , < 40a3334ffda479c63e416e61ff086485e24401f7 (git)
Affected: 080f40a6fa28dab299da7a652e444b1e2d9231e7 , < c1b39fa24c140bc616f51fef4175c1743e2bb132 (git)
Affected: 080f40a6fa28dab299da7a652e444b1e2d9231e7 , < 7c308f7530bffafa994e0aa8dc651a312f4b9ff4 (git)
Affected: 080f40a6fa28dab299da7a652e444b1e2d9231e7 , < 94a7fc42e21c7d9d1c49778cd1db52de5df52a01 (git)
Affected: 080f40a6fa28dab299da7a652e444b1e2d9231e7 , < 3b1a593eab941c3f32417896cc7df564191f2482 (git)
Affected: 080f40a6fa28dab299da7a652e444b1e2d9231e7 , < 248e8e1a125fa875158df521b30f2cc7e27eeeaa (git)
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    Linux Linux Affected: 3.8
Unaffected: 0 , < 3.8 (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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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c"
          ],
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          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "3.8"
            },
            {
              "lessThan": "3.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.249",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.199",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.162",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.122",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.68",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
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                },
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: kvaser_usb: kvaser_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 kvaser_usb_set_{,data_}bittiming() -\u003e kvaser_usb_setup_rx_urbs(), the\nURBs for USB-in transfers are allocated, added to the dev-\u003erx_submitted\nanchor and submitted. In the complete callback\nkvaser_usb_read_bulk_callback(), the URBs are processed and resubmitted. In\nkvaser_usb_remove_interfaces() the URBs are freed by calling\nusb_kill_anchored_urbs(\u0026dev-\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\nkvaser_usb_read_bulk_callback() to the dev-\u003erx_submitted anchor."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-09T08:37:59.685Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d9d824582f2ec76459ffab449e9b05c7bc49645c"
        },
        {
          "url": "https://git.kernel.org/stable/c/40a3334ffda479c63e416e61ff086485e24401f7"
        },
        {
          "url": "https://git.kernel.org/stable/c/c1b39fa24c140bc616f51fef4175c1743e2bb132"
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        {
          "url": "https://git.kernel.org/stable/c/248e8e1a125fa875158df521b30f2cc7e27eeeaa"
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      "title": "can: kvaser_usb: kvaser_usb_read_bulk_callback(): fix URB memory leak",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23061",
    "datePublished": "2026-02-04T16:07:43.626Z",
    "dateReserved": "2026-01-13T15:37:45.952Z",
    "dateUpdated": "2026-02-09T08:37:59.685Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23061\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-04T17:16:16.787\",\"lastModified\":\"2026-02-06T17:16:22.600\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncan: kvaser_usb: kvaser_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 kvaser_usb_set_{,data_}bittiming() -\u003e kvaser_usb_setup_rx_urbs(), the\\nURBs for USB-in transfers are allocated, added to the dev-\u003erx_submitted\\nanchor and submitted. In the complete callback\\nkvaser_usb_read_bulk_callback(), the URBs are processed and resubmitted. In\\nkvaser_usb_remove_interfaces() the URBs are freed by calling\\nusb_kill_anchored_urbs(\u0026dev-\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\\nkvaser_usb_read_bulk_callback() to the dev-\u003erx_submitted anchor.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/248e8e1a125fa875158df521b30f2cc7e27eeeaa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3b1a593eab941c3f32417896cc7df564191f2482\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/40a3334ffda479c63e416e61ff086485e24401f7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7c308f7530bffafa994e0aa8dc651a312f4b9ff4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/94a7fc42e21c7d9d1c49778cd1db52de5df52a01\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c1b39fa24c140bc616f51fef4175c1743e2bb132\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d9d824582f2ec76459ffab449e9b05c7bc49645c\",\"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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