FKIE_CVE-2026-64465

Vulnerability from fkie_nvd - Published: 2026-07-25 10:17 - Updated: 2026-07-25 10:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: xhci: Fix sleep in atomic context in xhci_free_streams() When a USB device with active stream endpoints is disconnected, xhci_free_streams() is called from the hub_event workqueue to free the stream resources. It calls xhci_free_stream_info() while holding xhci->lock with irqs disabled. xhci_free_stream_info() invokes xhci_free_stream_ctx(), which calls dma_free_coherent() for large stream context arrays. dma_free_coherent() can sleep (e.g. via vunmap), triggering a BUG when called from atomic context. Call trace: dma_free_attrs+0x174/0x220 xhci_free_stream_info+0xd0/0x11c xhci_free_streams+0x278/0x37c usb_free_streams+0x98/0xc0 usb_unbind_interface+0x1b8/0x2f8 device_release_driver_internal+0x1d4/0x2cc device_release_driver+0x18/0x28 bus_remove_device+0x160/0x1a4 device_del+0x1ec/0x350 usb_disable_device+0x98/0x214 usb_disconnect+0xf0/0x35c hub_event+0xab4/0x19ec process_one_work+0x278/0x63c Fix this by saving the stream_info pointers and clearing the ep references under the lock, then calling xhci_free_stream_info() outside the lock where sleeping is allowed.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/10666ac9c552990204e791af653abf8e9d9ff619
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1e45aa722c4ce5663e987102aac18c8ad6a83fdd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/42c37c4b75d38b51d84f31a8e29427f5e06a7c2a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/93cd037da94fcb93183bfb2457e3a56d3eb4c8f4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d107eb316144c5fb958486e7fe604cd7f1b35cda
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e623e4a203f56d5c57519a9a3cb29600551534ad
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f7b022ae07685e7526fc39f387ce65b5d309dd3b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f90586129cf9e1fbdb718ef602eea3f15dc1c31c
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/host/xhci.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e623e4a203f56d5c57519a9a3cb29600551534ad",
              "status": "affected",
              "version": "8df75f42f8e67e2851cdcf6da91640fb881defd1",
              "versionType": "git"
            },
            {
              "lessThan": "d107eb316144c5fb958486e7fe604cd7f1b35cda",
              "status": "affected",
              "version": "8df75f42f8e67e2851cdcf6da91640fb881defd1",
              "versionType": "git"
            },
            {
              "lessThan": "1e45aa722c4ce5663e987102aac18c8ad6a83fdd",
              "status": "affected",
              "version": "8df75f42f8e67e2851cdcf6da91640fb881defd1",
              "versionType": "git"
            },
            {
              "lessThan": "10666ac9c552990204e791af653abf8e9d9ff619",
              "status": "affected",
              "version": "8df75f42f8e67e2851cdcf6da91640fb881defd1",
              "versionType": "git"
            },
            {
              "lessThan": "f7b022ae07685e7526fc39f387ce65b5d309dd3b",
              "status": "affected",
              "version": "8df75f42f8e67e2851cdcf6da91640fb881defd1",
              "versionType": "git"
            },
            {
              "lessThan": "f90586129cf9e1fbdb718ef602eea3f15dc1c31c",
              "status": "affected",
              "version": "8df75f42f8e67e2851cdcf6da91640fb881defd1",
              "versionType": "git"
            },
            {
              "lessThan": "93cd037da94fcb93183bfb2457e3a56d3eb4c8f4",
              "status": "affected",
              "version": "8df75f42f8e67e2851cdcf6da91640fb881defd1",
              "versionType": "git"
            },
            {
              "lessThan": "42c37c4b75d38b51d84f31a8e29427f5e06a7c2a",
              "status": "affected",
              "version": "8df75f42f8e67e2851cdcf6da91640fb881defd1",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/host/xhci.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.35"
            },
            {
              "lessThan": "2.6.35",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: xhci: Fix sleep in atomic context in xhci_free_streams()\n\nWhen a USB device with active stream endpoints is disconnected,\nxhci_free_streams() is called from the hub_event workqueue to\nfree the stream resources.  It calls xhci_free_stream_info()\nwhile holding xhci-\u003elock with irqs disabled.\n\nxhci_free_stream_info() invokes xhci_free_stream_ctx(), which\ncalls dma_free_coherent() for large stream context arrays.\n\ndma_free_coherent() can sleep (e.g. via vunmap), triggering\na BUG when called from atomic context.\n\nCall trace:\n dma_free_attrs+0x174/0x220\n xhci_free_stream_info+0xd0/0x11c\n xhci_free_streams+0x278/0x37c\n usb_free_streams+0x98/0xc0\n usb_unbind_interface+0x1b8/0x2f8\n device_release_driver_internal+0x1d4/0x2cc\n device_release_driver+0x18/0x28\n bus_remove_device+0x160/0x1a4\n device_del+0x1ec/0x350\n usb_disable_device+0x98/0x214\n usb_disconnect+0xf0/0x35c\n hub_event+0xab4/0x19ec\n process_one_work+0x278/0x63c\n\nFix this by saving the stream_info pointers and clearing the\nep references under the lock, then calling xhci_free_stream_info()\noutside the lock where sleeping is allowed."
    }
  ],
  "id": "CVE-2026-64465",
  "lastModified": "2026-07-25T10:17:31.763",
  "metrics": {},
  "published": "2026-07-25T10:17:31.763",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/10666ac9c552990204e791af653abf8e9d9ff619"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1e45aa722c4ce5663e987102aac18c8ad6a83fdd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/42c37c4b75d38b51d84f31a8e29427f5e06a7c2a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/93cd037da94fcb93183bfb2457e3a56d3eb4c8f4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d107eb316144c5fb958486e7fe604cd7f1b35cda"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e623e4a203f56d5c57519a9a3cb29600551534ad"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f7b022ae07685e7526fc39f387ce65b5d309dd3b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f90586129cf9e1fbdb718ef602eea3f15dc1c31c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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