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CVE Record

CVE-2023-53475: usb: xhci: tegra: fix sleep in atomic call

In the Linux kernel, the following vulnerability has been resolved: usb: xhci: tegra: fix sleep in atomic call When we set the dual-role port to Host mode, we observed the following splat: [ 167.057718] BUG: sleeping function called from invalid context at include/linux/sched/mm.h:229 [ 167.057872] Workqueue: events tegra_xusb_usb_phy_work [ 167.057954] Call trace: [ 167.057962] dump_backtrace+0x0/0x210 [ 167.057996] show_stack+0x30/0x50 [ 167.058020] dump_stack_lvl+0x64/0x84 [ 167.058065] dump_stack+0x14/0x34 [ 167.058100] __might_resched+0x144/0x180 [ 167.058140] __might_sleep+0x64/0xd0 [ 167.058171] slab_pre_alloc_hook.constprop.0+0xa8/0x110 [ 167.058202] __kmalloc_track_caller+0x74/0x2b0 [ 167.058233] kvasprintf+0xa4/0x190 [ 167.058261] kasprintf+0x58/0x90 [ 167.058285] tegra_xusb_find_port_node.isra.0+0x58/0xd0 [ 167.058334] tegra_xusb_find_port+0x38/0xa0 [ 167.058380] tegra_xusb_padctl_get_usb3_companion+0x38/0xd0 [ 167.058430] tegra_xhci_id_notify+0x8c/0x1e0 [ 167.058473] notifier_call_chain+0x88/0x100 [ 167.058506] atomic_notifier_call_chain+0x44/0x70 [ 167.058537] tegra_xusb_usb_phy_work+0x60/0xd0 [ 167.058581] process_one_work+0x1dc/0x4c0 [ 167.058618] worker_thread+0x54/0x410 [ 167.058650] kthread+0x188/0x1b0 [ 167.058672] ret_from_fork+0x10/0x20 The function tegra_xusb_padctl_get_usb3_companion eventually calls tegra_xusb_find_port and this in turn calls kasprintf which might sleep and so cannot be called from an atomic context. Fix this by moving the call to tegra_xusb_padctl_get_usb3_companion to the tegra_xhci_id_work function where it is really needed.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2023-53475 is a Linux kernel issue in the Tegra USB xHCI driver. Switching a dual-role USB port to Host mode can trigger an invalid sleep-in-atomic kernel warning. The public record identifies a kernel fix, but provides no CVSS score or confirmed exploitation evidence.

Executive priority

Treat as a targeted kernel maintenance item, not a broad emergency. Prioritize embedded or appliance fleets using Tegra USB dual-role ports, especially where USB role switching affects availability or field reliability.

Technical view

The vulnerable path calls tegra_xusb_padctl_get_usb3_companion from an atomic notifier context. That path reaches tegra_xusb_find_port, which calls kasprintf and may sleep. The kernel fix moves the companion lookup into tegra_xhci_id_work, where it is actually needed and not in the atomic call path.

Likely exposure

Exposure appears limited to Linux systems using the Tegra xHCI/XUSB dual-role USB functionality on affected kernel versions. General Linux servers without Tegra USB hardware or this driver path are unlikely to be exposed based on the supplied sources.

Exploitation context

The source describes reproduction when setting a dual-role port to Host mode. There is no KEV listing and no cited evidence of active exploitation. The described impact is a kernel invalid-context warning and potential device reliability issue; broader security impact is not established in the sources.

Researcher notes

The public CVE data lacks CVSS, CWE, and detailed exploitability analysis. The issue is driver-specific and tied to kernel context rules. Analysis should focus on affected kernel branches, downstream backports, and whether device configurations exercise Tegra dual-role USB Host transitions.

Mitigation direction

  • Update affected Linux kernels to versions containing the referenced stable fixes.
  • Prioritize Tegra-based devices using dual-role USB Host mode.
  • Use distribution or device-vendor kernel advisories for exact package guidance.
  • If no update is available, ask the vendor for supported mitigation guidance.

Validation and detection

  • Inventory Linux devices using Tegra xHCI/XUSB hardware or drivers.
  • Compare running kernel builds against vendor advisories and referenced stable commits.
  • Review kernel logs for sleep-in-atomic warnings involving tegra_xhci_id_notify.
  • Confirm updated kernels include the fix moving companion lookup to tegra_xhci_id_work.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
0ADP providers
6Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxf836e7843036fbf34320356e156cd4267fa5bfa2, f836e7843036fbf34320356e156cd4267fa5bfa2, f836e7843036fbf34320356e156cd4267fa5bfa2, f836e7843036fbf34320356e156cd4267fa5bfa2, f836e7843036fbf34320356e156cd4267fa5bfa2unaffected
LinuxLinux5.7, 0, 5.10.178, 5.15.107, 6.1.24, 6.2.11, 6.3affected
Weakness

CWE details

No CWE listed

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