CVE-2020-28921: An issue was discovered in Devid Espenschied PC Analyser through 4.10

Q: How do I fix CVE-2020-28921?

pc analyser: upgrade to newer than 4.10. Exact commands for each OS are on this page.

Q: Is CVE-2020-28921 being exploited?

CVE-2020-28921 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-28921 affect?

CVE-2020-28921 affects pc analyser. Severity is high (CVSS 8.8). An issue was discovered in Devid Espenschied PC Analyser through 4.10. The PCADRVX64.SYS kernel driver exposes IOCTL functionality that allows low-privilege users to read and write to arbitrary Model Specific Registers (MSRs). This could le

Q: How urgent is CVE-2020-28921?

Priority 49/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADE

CVE-2020-28921 is a high-severity flaw (CVSS 8.8) affecting pc analyser. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Devid Espenschied PC Analyser through 4.10. The PCADRVX64.SYS kernel driver exposes IOCTL functionality that allows low-privilege users to read and write to arbitrary Model Specific Registers (MSRs). This could lead to arbitrary Ring-0 code execution and escalation of privileges.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 49%)
CISA exploited list	No
Published	2020-11-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pcanalyser

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-11-27 18:15 UTCPublished CVE record published
2026-06-17 03:10 UTCUpdated Record last modified

pcanalyser pc analyser UPGRADE

Affected: <= 4.10

Fixed in: newer than 4.10

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pc-analyser || rpm -q pc-analyser || pc-analyser --version

2. UPGRADE to newer than 4.10 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pc-analyser

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pc-analyser

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-28921?

pc analyser: upgrade to newer than 4.10. Exact commands for each OS are on this page.

Is CVE-2020-28921 being exploited?

CVE-2020-28921 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-28921 affect?

CVE-2020-28921 affects pc analyser. Severity is high (CVSS 8.8). An issue was discovered in Devid Espenschied PC Analyser through 4.10. The PCADRVX64.SYS kernel driver exposes IOCTL functionality that allows low-privilege users to read and write to arbitrary Model Specific Registers (MSRs). This could le

How urgent is CVE-2020-28921?

Priority 49/100. High severity; Public exploit reference

Related CVEs

CVE-2020-28922 HIGH 8.8 UPGRADE An issue was discovered in Devid Espenschied PC Analyser through 4.10

References

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