CVE-2026-98428 (GCVE-0-2026-98428)
Vulnerability from cvelistv5
Published
2026-10-14 13:27
Modified
2026-10-26 06:55
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb: 6fire: Avoid embedded URBs The USB 6fire driver uses URBs embedded in different structs for PCM, MIDI and communication, and this is basically a buggy implementation nowadays; since a URB is managed with a refcount, this may lead to a UAF when the URB is released asynchronously. For addressing the problem, this patch converts those embedded URBs to ones that are properly allocated via usb_alloc_urb(). The pcm_urb.packets[] is gone, as it's allocated by usb_alloc_urb(), hence it's found in urb.iso_frame_desc[] instead. The conversions are rather straightforward; each embedded struct urb is changed to a pointer, and its callers are updated accordingly. The resource for those structs are released in the common destructor functions (usb6fire_comm_free(), etc), which are called at both the init error path and the disconnect. No functional changes, only compile-tested.
References
Impacted products
Vendor Product Version
Linux Linux Version: c6d43ba816d1cf1d125bfbfc938f2a28a87facf9
Version: c6d43ba816d1cf1d125bfbfc938f2a28a87facf9
Version: c6d43ba816d1cf1d125bfbfc938f2a28a87facf9
Version: c6d43ba816d1cf1d125bfbfc938f2a28a87facf9
Version: c6d43ba816d1cf1d125bfbfc938f2a28a87facf9
Version: c6d43ba816d1cf1d125bfbfc938f2a28a87facf9
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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/usb/6fire/comm.c",
            "sound/usb/6fire/comm.h",
            "sound/usb/6fire/midi.c",
            "sound/usb/6fire/midi.h",
            "sound/usb/6fire/pcm.c",
            "sound/usb/6fire/pcm.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "programFiles": [
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            "sound/usb/6fire/midi.c",
            "sound/usb/6fire/midi.h",
            "sound/usb/6fire/pcm.c",
            "sound/usb/6fire/pcm.h"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "versions": [
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              "version": "0",
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              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb: 6fire: Avoid embedded URBs\n\nThe USB 6fire driver uses URBs embedded in different structs for PCM,\nMIDI and communication, and this is basically a buggy implementation\nnowadays; since a URB is managed with a refcount, this may lead to a\nUAF when the URB is released asynchronously.\n\nFor addressing the problem, this patch converts those embedded URBs to\nones that are properly allocated via usb_alloc_urb().  The\npcm_urb.packets[] is gone, as it\u0027s allocated by usb_alloc_urb(), hence\nit\u0027s found in urb.iso_frame_desc[] instead.\n\nThe conversions are rather straightforward; each embedded struct urb\nis changed to a pointer, and its callers are updated accordingly.\nThe resource for those structs are released in the common destructor\nfunctions (usb6fire_comm_free(), etc), which are called at both the\ninit error path and the disconnect.\n\nNo functional changes, only compile-tested."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-26T06:55:43.958Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3ef9093d83ffecb8e5f6c9d5769a52d39df74f7a"
        },
        {
          "url": "https://git.kernel.org/stable/c/8b8559aeaba2e51cfee1779b2383b085991f7d81"
        },
        {
          "url": "https://git.kernel.org/stable/c/52a43c2d57e774489ac3fbbac06ff02f19bd9a52"
        },
        {
          "url": "https://git.kernel.org/stable/c/999f433c09e4668412bd68ca207ae2b4af863862"
        },
        {
          "url": "https://git.kernel.org/stable/c/d181434549b3da668110a25d743848cce9897f4e"
        },
        {
          "url": "https://git.kernel.org/stable/c/9fe49dbc023e82dfaee7b245997d820d01742a9a"
        }
      ],
      "title": "ALSA: usb: 6fire: Avoid embedded URBs",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98428",
    "datePublished": "2026-10-14T13:27:54.364Z",
    "dateReserved": "2026-09-25T10:25:14.348Z",
    "dateUpdated": "2026-10-26T06:55:43.958Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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