CVE-2023-53475

Kernel warning via atomic-context memory allocation

Published Oct 1, 2025 · Updated Oct 1, 2025

An atomic-context sleep in the Linux kernel allows attackers to trigger a kernel warning through a Tegra USB OTG role change. The tegra_xhci_id_notify path calls tegra_xusb_padctl_get_usb3_companion, which reaches kasprintf and allocates potentially sleeping memory inside an atomic notifier context. Reachability requires Tegra dual-role USB hardware to switch its OTG port into host mode; the published report establishes a warning trace but no crash, code execution, or data exposure.

CVSS severityUnavailable
Unscored
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An atomic-context sleep in the Linux kernel allows attackers to trigger a kernel warning through a Tegra USB OTG role change. The tegra_xhci_id_notify path calls tegra_xusb_padctl_get_usb3_companion, which reaches kasprintf and allocates potentially sleeping memory inside an atomic notifier context. Reachability requires Tegra dual-role USB hardware to switch its OTG port into host mode; the published report establishes a warning trace but no crash, code execution, or data exposure.

The record

CVE
CVE-2023-53475
Published
Oct 1, 2025
Updated
Oct 1, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.7
  2. Affected versionversion=f836e7843036fbf34320356e156cd4267fa5bfa2 <1122474b757a5dd8b2b50008a97f33cdb10dff6e
  3. Affected versionversion=f836e7843036fbf34320356e156cd4267fa5bfa2 <130c61c516cd0684282a8f6ab163281d60642fc5
  4. Affected versionversion=f836e7843036fbf34320356e156cd4267fa5bfa2 <1fe6015aa92cc0dfd875c1d3c7c1750a1b0767d9
  5. Affected versionversion=f836e7843036fbf34320356e156cd4267fa5bfa2 <4c7f9d2e413dc06a157c4e5dccde84aaf4655eb3
  6. Affected versionversion=f836e7843036fbf34320356e156cd4267fa5bfa2 <b4b4f17aa46c025da77aed5133b08971959c9684

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.7; version=f836e7843036fbf34320356e156cd4267fa5bfa2 <1122474b757a5dd8b2b50008a97f33cdb10dff6e; version=f836e7843036fbf34320356e156cd4267fa5bfa2 <130c61c516cd0684282a8f6ab163281d60642fc5; version=f836e7843036fbf34320356e156cd4267fa5bfa2 <1fe6015aa92cc0dfd875c1d3c7c1750a1b0767d9; version=f836e7843036fbf34320356e156cd4267fa5bfa2 <4c7f9d2e413dc06a157c4e5dccde84aaf4655eb3; version=f836e7843036fbf34320356e156cd4267fa5bfa2 <b4b4f17aa46c025da77aed5133b08971959c9684

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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