CVE-2022-49661 (GCVE-0-2022-49661)
Vulnerability from cvelistv5
Published
2025-02-26 02:23
Modified
2025-05-04 08:42
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: can: gs_usb: gs_usb_open/close(): fix memory leak The gs_usb driver appears to suffer from a malady common to many USB CAN adapter drivers in that it performs usb_alloc_coherent() to allocate a number of USB request blocks (URBs) for RX, and then later relies on usb_kill_anchored_urbs() to free them, but this doesn't actually free them. As a result, this may be leaking DMA memory that's been used by the driver. This commit is an adaptation of the techniques found in the esd_usb2 driver where a similar design pattern led to a memory leak. It explicitly frees the RX URBs and their DMA memory via a call to usb_free_coherent(). Since the RX URBs were allocated in the gs_can_open(), we remove them in gs_can_close() rather than in the disconnect function as was done in esd_usb2. For more information, see the 928150fad41b ("can: esd_usb2: fix memory leak").
References
https://git.kernel.org/stable/c/339fa9f80d3b94177a7a459c6d115d3b56007d5a
https://git.kernel.org/stable/c/c1d806bc29ff7ffe0e2a023583c8720ed96cb0b0
https://git.kernel.org/stable/c/d91492638b054f4a359621ef216242be5973ed6b
https://git.kernel.org/stable/c/6f655b5e13fa4b27e915b6c209ac0da74fd75963
https://git.kernel.org/stable/c/d0b8e223998866b3e7b2895927d4e9689b0a80d8
https://git.kernel.org/stable/c/0e60230bc64355c80abe993d1719fdb318094e20
https://git.kernel.org/stable/c/ffb6cc6601ec7c8fa963dcf76025df4a02f2cf5c
https://git.kernel.org/stable/c/2bda24ef95c0311ab93bda00db40486acf30bd0a
Impacted products
Vendor Product Version
Linux Linux Version: d08e973a77d128b25e01a08c34d89593fdf222da
Version: d08e973a77d128b25e01a08c34d89593fdf222da
Version: d08e973a77d128b25e01a08c34d89593fdf222da
Version: d08e973a77d128b25e01a08c34d89593fdf222da
Version: d08e973a77d128b25e01a08c34d89593fdf222da
Version: d08e973a77d128b25e01a08c34d89593fdf222da
Version: d08e973a77d128b25e01a08c34d89593fdf222da
Version: d08e973a77d128b25e01a08c34d89593fdf222da
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   Linux Linux Version: 3.16
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{
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          "programFiles": [
            "drivers/net/can/usb/gs_usb.c"
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: gs_usb: gs_usb_open/close(): fix memory leak\n\nThe gs_usb driver appears to suffer from a malady common to many USB\nCAN adapter drivers in that it performs usb_alloc_coherent() to\nallocate a number of USB request blocks (URBs) for RX, and then later\nrelies on usb_kill_anchored_urbs() to free them, but this doesn\u0027t\nactually free them. As a result, this may be leaking DMA memory that\u0027s\nbeen used by the driver.\n\nThis commit is an adaptation of the techniques found in the esd_usb2\ndriver where a similar design pattern led to a memory leak. It\nexplicitly frees the RX URBs and their DMA memory via a call to\nusb_free_coherent(). Since the RX URBs were allocated in the\ngs_can_open(), we remove them in gs_can_close() rather than in the\ndisconnect function as was done in esd_usb2.\n\nFor more information, see the 928150fad41b (\"can: esd_usb2: fix memory\nleak\")."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T08:42:47.296Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/339fa9f80d3b94177a7a459c6d115d3b56007d5a"
        },
        {
          "url": "https://git.kernel.org/stable/c/c1d806bc29ff7ffe0e2a023583c8720ed96cb0b0"
        },
        {
          "url": "https://git.kernel.org/stable/c/d91492638b054f4a359621ef216242be5973ed6b"
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        {
          "url": "https://git.kernel.org/stable/c/6f655b5e13fa4b27e915b6c209ac0da74fd75963"
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          "url": "https://git.kernel.org/stable/c/d0b8e223998866b3e7b2895927d4e9689b0a80d8"
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        {
          "url": "https://git.kernel.org/stable/c/0e60230bc64355c80abe993d1719fdb318094e20"
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        {
          "url": "https://git.kernel.org/stable/c/ffb6cc6601ec7c8fa963dcf76025df4a02f2cf5c"
        },
        {
          "url": "https://git.kernel.org/stable/c/2bda24ef95c0311ab93bda00db40486acf30bd0a"
        }
      ],
      "title": "can: gs_usb: gs_usb_open/close(): fix memory leak",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  },
  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49661",
    "datePublished": "2025-02-26T02:23:58.352Z",
    "dateReserved": "2025-02-26T02:21:30.435Z",
    "dateUpdated": "2025-05-04T08:42:47.296Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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