CVE-2023-54277Public exploit

Driver probe failure via mismatched USB endpoint

Published Dec 30, 2025 · Updated Dec 30, 2025

Endpoint validation in affected Linux kernels allows physically proximate attackers to trigger an udlfb driver probe failure via USB. The dlfb_usb_probe function accepts any bulk-OUT endpoint, while dlfb_submit_urb always sends through endpoint 1 without verifying that endpoint 1 is bulk-OUT. Exploitation requires attachment or emulation of a crafted USB DisplayLink device; the observed result is a kernel warning and rejected driver probe, not a system crash.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Endpoint validation in affected Linux kernels allows physically proximate attackers to trigger an udlfb driver probe failure via USB. The dlfb_usb_probe function accepts any bulk-OUT endpoint, while dlfb_submit_urb always sends through endpoint 1 without verifying that endpoint 1 is bulk-OUT. Exploitation requires attachment or emulation of a crafted USB DisplayLink device; the observed result is a kernel warning and rejected driver probe, not a system crash.

The record

CVE
CVE-2023-54277
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1200
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4df1584738f1dc6f0dd854d258bba48591f1ed0e <9e12c58a5ece41be72157cef348576b135c9fc72
  2. Affected versionversion=5.18
  3. Affected versionversion=895ea8a290ba87850bcaf2ecfcddef75a014fa54
  4. Affected versionversion=aaf7dbe07385e0b8deb7237eca2a79926bbc7091 <c8fdf7feca77cd99e25ef0a1e9e72dfc83add8ef
  5. Affected versionversion=aaf7dbe07385e0b8deb7237eca2a79926bbc7091 <e19383e5dee5adbf3d19f3f210f440a88d1b7dde
  6. Affected versionversion=aaf7dbe07385e0b8deb7237eca2a79926bbc7091 <ed9de4ed39875706607fb08118a58344ae6c5f42
  7. Affected versionversion=c4fb41bdf4d6ccca850c4af5d707d14a0fb717a7 <58ecc165abdaed85447455e6dc396758e8c6f219
  8. Affected versionversion=f6db63819db632158647d5bbf4d7d2d90dc1a268 <1522dc58bff87af79461b96d90ec122e9e726004

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4df1584738f1dc6f0dd854d258bba48591f1ed0e <9e12c58a5ece41be72157cef348576b135c9fc72; version=5.18; version=895ea8a290ba87850bcaf2ecfcddef75a014fa54; version=aaf7dbe07385e0b8deb7237eca2a79926bbc7091 <c8fdf7feca77cd99e25ef0a1e9e72dfc83add8ef; version=aaf7dbe07385e0b8deb7237eca2a79926bbc7091 <e19383e5dee5adbf3d19f3f210f440a88d1b7dde; version=aaf7dbe07385e0b8deb7237eca2a79926bbc7091 <ed9de4ed39875706607fb08118a58344ae6c5f42; version=c4fb41bdf4d6ccca850c4af5d707d14a0fb717a7 <58ecc165abdaed85447455e6dc396758e8c6f219; version=f6db63819db632158647d5bbf4d7d2d90dc1a268 <1522dc58bff87af79461b96d90ec122e9e726004

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)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1200Hardware Additions

Public exploit references

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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