CVE-2023-20556

Local Windows crash via uninitialized IOCTL state

Published Aug 8, 2023 · Updated Oct 10, 2024

Denial of service in AMD uProf before 4.1.396 on Windows allows local users to crash the host with a crafted IOCTL buffer. The AMDPowerProfiler.sys handler for IOCTL 0x22201C passes an uninitialized items structure into a fixed-size memcpy through a supplied address. A locally authenticated account able to open the driver device can trigger the kernel fault, interrupting the entire host rather than only the profiler.

CVSS severity5.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in AMD uProf before 4.1.396 on Windows allows local users to crash the host with a crafted IOCTL buffer. The AMDPowerProfiler.sys handler for IOCTL 0x22201C passes an uninitialized items structure into a fixed-size memcpy through a supplied address. A locally authenticated account able to open the driver device can trigger the kernel fault, interrupting the entire host rather than only the profiler.

The record

CVE
CVE-2023-20556
Published
Aug 8, 2023
Updated
Oct 10, 2024
Vendor
Advanced Micro Devices, Inc.
Product
AMD uProf
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 10, 2024Record 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=various <4.1.396
  2. Affected versionversion=various <4.1-424

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Advanced Micro Devices, Inc. · AMD uProfversion=various <4.1.396; version=various <4.1-424

Published CVSS scores

5.5NIST NVDCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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

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Your stack

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