CVE-2025-37813 (GCVE-0-2025-37813)

Vulnerability from cvelistv5 – Published: 2025-05-08 06:26 – Updated: 2025-05-26 05:21
VLAI?
Title
usb: xhci: Fix invalid pointer dereference in Etron workaround
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: xhci: Fix invalid pointer dereference in Etron workaround This check is performed before prepare_transfer() and prepare_ring(), so enqueue can already point at the final link TRB of a segment. And indeed it will, some 0.4% of times this code is called. Then enqueue + 1 is an invalid pointer. It will crash the kernel right away or load some junk which may look like a link TRB and cause the real link TRB to be replaced with a NOOP. This wouldn't end well. Use a functionally equivalent test which doesn't dereference the pointer and always gives correct result. Something has crashed my machine twice in recent days while playing with an Etron HC, and a control transfer stress test ran for confirmation has just crashed it again. The same test passes with this patch applied.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: fbc0a0c7718a6cb1dc5e0811a4f88a2b1deedfa1 , < 142273a49f2c315eabdbdf5a71c15e479b75ca91 (git)
Affected: 9258c9ed32294ce3a4b58c9d92fc49ba030d35c9 , < bce3055b08e303e28a8751f6073066f5c33a0744 (git)
Affected: 5e1c67abc9301d05130b7e267c204e7005503b33 , < 0624e29c595b05e7a0e6d1c368f0a05799928e30 (git)
Affected: 5e1c67abc9301d05130b7e267c204e7005503b33 , < 1ea050da5562af9b930d17cbbe9632d30f5df43a (git)
Affected: 4725344ca645a98a9d8e45e25b01a2244de5b8aa (git)
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    Linux Linux Affected: 6.13
Unaffected: 0 , < 6.13 (semver)
Unaffected: 6.6.89 , ≤ 6.6.* (semver)
Unaffected: 6.12.26 , ≤ 6.12.* (semver)
Unaffected: 6.14.5 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: xhci: Fix invalid pointer dereference in Etron workaround\n\nThis check is performed before prepare_transfer() and prepare_ring(), so\nenqueue can already point at the final link TRB of a segment. And indeed\nit will, some 0.4% of times this code is called.\n\nThen enqueue + 1 is an invalid pointer. It will crash the kernel right\naway or load some junk which may look like a link TRB and cause the real\nlink TRB to be replaced with a NOOP. This wouldn\u0027t end well.\n\nUse a functionally equivalent test which doesn\u0027t dereference the pointer\nand always gives correct result.\n\nSomething has crashed my machine twice in recent days while playing with\nan Etron HC, and a control transfer stress test ran for confirmation has\njust crashed it again. The same test passes with this patch applied."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-26T05:21:24.931Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      ],
      "title": "usb: xhci: Fix invalid pointer dereference in Etron workaround",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-37813",
    "datePublished": "2025-05-08T06:26:10.000Z",
    "dateReserved": "2025-04-16T04:51:23.946Z",
    "dateUpdated": "2025-05-26T05:21:24.931Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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