9.9
CRITICAL
CVE-2021-26334
AMD μProf Tool MSRing -0 Privilege Escalation Vulnerability
Description

The AMDPowerProfiler.sys driver of AMD μProf tool may allow lower privileged users to access MSRs in kernel which may lead to privilege escalation and ring-0 code execution by the lower privileged user.

INFO

Published Date :

Dec. 1, 2021, 4:15 p.m.

Last Modified :

Nov. 7, 2023, 3:31 a.m.

Remotely Exploitable :

Yes !

Impact Score :

6.0

Exploitability Score :

3.1
Affected Products

The following products are affected by CVE-2021-26334 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Amd amd_uprof
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-26334.

URL Resource
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1016 Mitigation Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-26334 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-26334 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Changed Description The AMDPowerProfiler.sys driver of AMD ?Prof tool may allow lower privileged users to access MSRs in kernel which may lead to privilege escalation and ring-0 code execution by the lower privileged user. The AMDPowerProfiler.sys driver of AMD μProf tool may allow lower privileged users to access MSRs in kernel which may lead to privilege escalation and ring-0 code execution by the lower privileged user.
  • Modified Analysis by [email protected]

    Mar. 01, 2023

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Jan. 25, 2023

    Action Type Old Value New Value
    Changed Description The AMDPowerProfiler.sys driver of AMD ?Prof tool may allow lower privileged users to access MSRs in kernel which may lead to privilege escalation and ring-0 code execution by the lower privileged user. The AMDPowerProfiler.sys driver of AMD ?Prof tool may allow lower privileged users to access MSRs in kernel which may lead to privilege escalation and ring-0 code execution by the lower privileged user.
  • Modified Analysis by [email protected]

    Jul. 02, 2022

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    May. 16, 2022

    Action Type Old Value New Value
    Changed Description The AMDPowerProfiler.sys driver of AMD ?Prof tool may allow lower privileged users to access MSRs in kernel which may lead to privilege escalation and ring-0 code execution by the lower privileged user. The AMDPowerProfiler.sys driver of AMD ?Prof tool may allow lower privileged users to access MSRs in kernel which may lead to privilege escalation and ring-0 code execution by the lower privileged user.
  • CVE Modified by [email protected]

    May. 12, 2022

    Action Type Old Value New Value
    Changed Description The AMDPowerProfiler.sys driver of AMD ?Prof tool may allow lower privileged users to access MSRs in kernel which may lead to privilege escalation and ring-0 code execution by the lower privileged user. The AMDPowerProfiler.sys driver of AMD ?Prof tool may allow lower privileged users to access MSRs in kernel which may lead to privilege escalation and ring-0 code execution by the lower privileged user.
  • CVE Modified by [email protected]

    May. 12, 2022

    Action Type Old Value New Value
    Changed Description The AMDPowerProfiler.sys driver of AMD ?Prof tool may allow lower privileged users to access MSRs in kernel which may lead to privilege escalation and ring-0 code execution by the lower privileged user. The AMDPowerProfiler.sys driver of AMD ?Prof tool may allow lower privileged users to access MSRs in kernel which may lead to privilege escalation and ring-0 code execution by the lower privileged user.
  • Reanalysis by [email protected]

    Apr. 26, 2022

    Action Type Old Value New Value
    Removed CWE NIST CWE-269
    Added CWE NIST NVD-CWE-Other
  • Initial Analysis by [email protected]

    Dec. 03, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:C/I:C/A:C)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
    Changed Reference Type https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1016 No Types Assigned https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1016 Mitigation, Vendor Advisory
    Added CWE NIST CWE-269
    Added CPE Configuration AND OR *cpe:2.3:a:amd:amd_uprof:*:*:*:*:*:*:*:* versions up to (excluding) 3.4.494 OR cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:a:amd:amd_uprof:*:*:*:*:*:*:*:* versions up to (excluding) 3.4.502 OR cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-26334 is associated with the following CWEs:

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.10 }} 0.00%

score

0.41463

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability