CVE-2019-19197: IOCTL Handling in the kyrld.sys driver in Kyrol Internet Security 9.0.6.9 allows an attacker to achieve privil

This month

HIGH 7.8DOWNGRADE

CVE-2019-19197 is a high-severity flaw (CVSS 7.8) affecting kyrol internet security. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IOCTL Handling in the kyrld.sys driver in Kyrol Internet Security 9.0.6.9 allows an attacker to achieve privilege escalation, denial-of-service, and code execution via usermode because 0x9C402401 using METHOD_NEITHER results in a read primitive.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-732
Published	2019-11-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: kyrolsecuritylabs

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

Am I affected?

Timeline

2019-11-21 19:15 UTCPublished CVE record published
2026-06-17 02:26 UTCUpdated Record last modified

kyrolsecuritylabs kyrol internet security DOWNGRADE

Affected: 9.0.6.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.0.6.9

1. Check installed version

apt-cache policy kyrol-internet-security || rpm -q kyrol-internet-security || kyrol-internet-security --version

2. No fixed release: DOWNGRADE to a release before 9.0.6.9 (Debian / Ubuntu)

apt-cache madison kyrol-internet-security sudo apt install kyrol-internet-security=<VERSION_BEFORE_9.0.6.9> sudo apt-mark hold kyrol-internet-security

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

dnf --showduplicates list kyrol-internet-security sudo dnf downgrade kyrol-internet-security-<VERSION_BEFORE_9.0.6.9> sudo dnf versionlock add kyrol-internet-security

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-2019-19197?

kyrol internet security: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-19197 being exploited?

CVE-2019-19197 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-2019-19197 affect?

CVE-2019-19197 affects kyrol internet security. Severity is high (CVSS 7.8). IOCTL Handling in the kyrld.sys driver in Kyrol Internet Security 9.0.6.9 allows an attacker to achieve privilege escalation, denial-of-service, and code execution via usermode because 0x9C402401 using METHOD_NEITHER results in a read primi

How urgent is CVE-2019-19197?

Priority 44/100. High severity; Public exploit reference

References

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