CVE-2019-1010066: Lawrence Livermore National Laboratory msr-safe v1.1.0 is affected by: Incorrect Access Control

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2019-1010066 is a high-severity flaw (CVSS 7.5) affecting model specific registers-safe. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Lawrence Livermore National Laboratory msr-safe v1.1.0 is affected by: Incorrect Access Control. The impact is: An attacker could modify model specific registers. The component is: ioctl handling. The attack vector is: An attacker could exploit a bug in ioctl interface whitelist checking, in order to write to model specific registers, normally a function reserved for the root user. The fixed version is: v1.2.0.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 29%)
CISA exploited list	No
Weakness	CWE-269, CWE-862
Published	2019-07-18
Last modified	2026-06-17

Publisher (CNA): DWF · Vendor: llnl

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

Am I affected?

Timeline

2019-07-18 14:15 UTCPublished CVE record published
2026-06-17 02:09 UTCUpdated Record last modified

llnl model specific registers-safe DOWNGRADE

Affected: 1.1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.0

1. Check installed version

apt-cache policy model-specific-registers-safe || rpm -q model-specific-registers-safe || model-specific-registers-safe --version

2. No fixed release: DOWNGRADE to a release before 1.1.0 (Debian / Ubuntu)

apt-cache madison model-specific-registers-safe sudo apt install model-specific-registers-safe=<VERSION_BEFORE_1.1.0> sudo apt-mark hold model-specific-registers-safe

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list model-specific-registers-safe sudo dnf downgrade model-specific-registers-safe-<VERSION_BEFORE_1.1.0> sudo dnf versionlock add model-specific-registers-safe

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2019-1010066?

model specific registers-safe: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-1010066 being exploited?

CVE-2019-1010066 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-2019-1010066 affect?

CVE-2019-1010066 affects model specific registers-safe. Severity is high (CVSS 7.5). Lawrence Livermore National Laboratory msr-safe v1.1.0 is affected by: Incorrect Access Control. The impact is: An attacker could modify model specific registers. The component is: ioctl handling. The attack vector is: An attacker could exp

How urgent is CVE-2019-1010066?

Priority 54/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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