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CVE-2026-64465

usb: xhci: Fix sleep in atomic context in xhci_free_streams()

publishedCWE-667

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.

Technical severity5.5 mediumCVSS 3.1 · NVD: [email protected]

Published2026-07-25Source updated 2026-11-12

Collected2026-11-123 attributed sources

Fixes and workarounds

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
Linux Linux	≥ 8df75f42f8e67e2851cdcf6da91640fb881defd1; < e623e4a203f56d5c57519a9a3cb29600551534ad (affected, git) ≥ 8df75f42f8e67e2851cdcf6da91640fb881defd1; < d107eb316144c5fb958486e7fe604cd7f1b35cda (affected, git) ≥ 8df75f42f8e67e2851cdcf6da91640fb881defd1; < 1e45aa722c4ce5663e987102aac18c8ad6a83fdd (affected, git) ≥ 8df75f42f8e67e2851cdcf6da91640fb881defd1; < 10666ac9c552990204e791af653abf8e9d9ff619 (affected, git) ≥ 8df75f42f8e67e2851cdcf6da91640fb881defd1; < f7b022ae07685e7526fc39f387ce65b5d309dd3b (affected, git) ≥ 8df75f42f8e67e2851cdcf6da91640fb881defd1; < f90586129cf9e1fbdb718ef602eea3f15dc1c31c (affected, git) ≥ 8df75f42f8e67e2851cdcf6da91640fb881defd1; < 93cd037da94fcb93183bfb2457e3a56d3eb4c8f4 (affected, git) ≥ 8df75f42f8e67e2851cdcf6da91640fb881defd1; < 42c37c4b75d38b51d84f31a8e29427f5e06a7c2a (affected, git) Other versions: unaffected	CNA: Linux
Linux Linux	2.6.35 (affected) ≥ 0; < 2.6.35 (unaffected, semver) ≥ 5.10.261; ≤ 5.10.* (unaffected, semver) ≥ 5.15.212; ≤ 5.15.* (unaffected, semver) ≥ 6.1.178; ≤ 6.1.* (unaffected, semver) ≥ 6.6.145; ≤ 6.6.* (unaffected, semver) ≥ 6.12.96; ≤ 6.12.* (unaffected, semver) ≥ 6.18.39; ≤ 6.18.* (unaffected, semver) ≥ 7.1.4; ≤ 7.1.* (unaffected, semver) ≥ 7.2; ≤ * (unaffected, original_commit_for_fix) Other versions: affected	CNA: Linux

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

NVD applicability configurations (1)

These expressions retain AND/OR operators, negation, and required environmental products. A listed product is not sufficient to establish exposure when additional conditions apply.

[
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "5.10.261",
            "versionStartIncluding": "2.6.35",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "5.15.212",
            "versionStartIncluding": "5.11",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "6.1.178",
            "versionStartIncluding": "5.16",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "6.6.145",
            "versionStartIncluding": "6.2",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "6.12.96",
            "versionStartIncluding": "6.7",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "6.18.39",
            "versionStartIncluding": "6.13",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "7.1.4",
            "versionStartIncluding": "6.19",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:*",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  }
]

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 5.5 medium	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`	NVD: [email protected]

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://git.kernel.org/stable/c/e623e4a203f56d5c57519a9a3cb29600551534adCNA: Linux
https://git.kernel.org/stable/c/d107eb316144c5fb958486e7fe604cd7f1b35cdaCNA: Linux
https://git.kernel.org/stable/c/1e45aa722c4ce5663e987102aac18c8ad6a83fddCNA: Linux
https://git.kernel.org/stable/c/10666ac9c552990204e791af653abf8e9d9ff619CNA: Linux
https://git.kernel.org/stable/c/f7b022ae07685e7526fc39f387ce65b5d309dd3bCNA: Linux
https://git.kernel.org/stable/c/f90586129cf9e1fbdb718ef602eea3f15dc1c31cCNA: Linux
https://git.kernel.org/stable/c/93cd037da94fcb93183bfb2457e3a56d3eb4c8f4CNA: Linux
https://git.kernel.org/stable/c/42c37c4b75d38b51d84f31a8e29427f5e06a7c2aCNA: Linux
https://git.kernel.org/stable/c/10666ac9c552990204e791af653abf8e9d9ff619416baaa9-dc9f-4396-8d5f-8c081fb06d67 · Patch
https://git.kernel.org/stable/c/1e45aa722c4ce5663e987102aac18c8ad6a83fdd416baaa9-dc9f-4396-8d5f-8c081fb06d67 · Patch
https://git.kernel.org/stable/c/42c37c4b75d38b51d84f31a8e29427f5e06a7c2a416baaa9-dc9f-4396-8d5f-8c081fb06d67 · Patch
https://git.kernel.org/stable/c/93cd037da94fcb93183bfb2457e3a56d3eb4c8f4416baaa9-dc9f-4396-8d5f-8c081fb06d67 · Patch
https://git.kernel.org/stable/c/d107eb316144c5fb958486e7fe604cd7f1b35cda416baaa9-dc9f-4396-8d5f-8c081fb06d67 · Patch
https://git.kernel.org/stable/c/e623e4a203f56d5c57519a9a3cb29600551534ad416baaa9-dc9f-4396-8d5f-8c081fb06d67 · Patch
https://git.kernel.org/stable/c/f7b022ae07685e7526fc39f387ce65b5d309dd3b416baaa9-dc9f-4396-8d5f-8c081fb06d67 · Patch
https://git.kernel.org/stable/c/f90586129cf9e1fbdb718ef602eea3f15dc1c31c416baaa9-dc9f-4396-8d5f-8c081fb06d67 · Patch

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