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🛡️ CVE-2023-53475 — kernel

🟡 CVSS 5.5 — Medium ✅ No Known Exploit NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: None.
  • Integrity impact: None.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

CVE-2023-53475 is recorded against 2 packages.

  • kernel (from 6.2.0 up to 6.2.11)
  • linux-kernel

Timeline and source

Published on 1 October 2025 and last revised on 12 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

Other advisories for this package

kernel has other advisories on record. If you are patching this one, these are worth checking on the same host:

CVE-2023-53475 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Medium
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2025-10-01
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 6.2.0 6.2.11
linux-kernel — —

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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