CVE-2023-20562Public exploit

Kernel code execution via unchecked IOCTL write

Published Aug 8, 2023 · Updated Oct 10, 2024

Privilege escalation in AMD uProf before 4.1.396 on Windows and before 4.1-424 on Linux allows local users to execute code in the kernel. On Windows, AMDCpuProfiler.sys accepts attacker-controlled IOCTL data without sufficient validation, enabling an arbitrary kernel-memory write; AMD has not published the Linux-specific locus. A low-privileged local account can overwrite an EPROCESS token to obtain SYSTEM privileges or disable driver-signature enforcement and load an unsigned driver.

CVSS severity7.8
High
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in AMD uProf before 4.1.396 on Windows and before 4.1-424 on Linux allows local users to execute code in the kernel. On Windows, AMDCpuProfiler.sys accepts attacker-controlled IOCTL data without sufficient validation, enabling an arbitrary kernel-memory write; AMD has not published the Linux-specific locus. A low-privileged local account can overwrite an EPROCESS token to obtain SYSTEM privileges or disable driver-signature enforcement and load an unsigned driver.

The record

CVE
CVE-2023-20562
Published
Aug 8, 2023
Updated
Oct 10, 2024
Vendor
Advanced Micro Devices, Inc.
Product
AMD uProf
Classifications
T1068
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=0 <4.1.396
  2. Affected versionversion=0 <4.1-424
  3. Affected versionversion=various <4.1.396
  4. Affected versionversion=various <4.1-424

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Advanced Micro Devices, Inc. · AMD uProfversion=0 <4.1.396; version=0 <4.1-424; version=various <4.1.396; version=various <4.1-424

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

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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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

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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