CVE-2023-54263

Local kernel crash via uninitialized PIOR mutex

Published Dec 30, 2025 · Updated Dec 30, 2025

Denial of service in the Linux nouveau display driver allows local users to crash the kernel on systems with ANX9805 DP encoders. The PIOR creation path in drivers/gpu/drm/nouveau/dispnv50/disp.c leaves dp.hpd_irq_lock uninitialized before hot-plug handling uses the mutex. The fault requires the nouveau driver to manage an ANX9805 DisplayPort encoder, and the resulting kernel OOPS interrupts the affected host.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in the Linux nouveau display driver allows local users to crash the kernel on systems with ANX9805 DP encoders. The PIOR creation path in drivers/gpu/drm/nouveau/dispnv50/disp.c leaves dp.hpd_irq_lock uninitialized before hot-plug handling uses the mutex. The fault requires the nouveau driver to manage an ANX9805 DisplayPort encoder, and the resulting kernel OOPS interrupts the affected host.

The record

CVE
CVE-2023-54263
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <92d48ce21645267c574268678131cd2b648dad0f
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ea293f823a8805735d9e00124df81a8f448ed1ae

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <92d48ce21645267c574268678131cd2b648dad0f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ea293f823a8805735d9e00124df81a8f448ed1ae

Published CVSS scores

5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo