CVE-2021-44852: An issue was discovered in BS_RCIO64.sys in Biostar RACING GT Evo 2.1.1905.1700

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HIGH 7.8DOWNGRADE

CVE-2021-44852 is a high-severity flaw (CVSS 7.8) affecting racing gt evo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in BS_RCIO64.sys in Biostar RACING GT Evo 2.1.1905.1700. A low-integrity process can open the driver's device object and issue IOCTLs to read or write to arbitrary physical memory locations (or call an arbitrary address), leading to execution of arbitrary code. This is associated with 0x226040, 0x226044, and 0x226000.

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	0.8% (top 44%)
CISA exploited list	No
Published	2022-01-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: biostar

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

Am I affected?

Timeline

2022-01-01 06:15 UTCPublished CVE record published
2026-06-17 04:12 UTCUpdated Record last modified

biostar racing gt evo DOWNGRADE

Affected: 2.1.1905.1700

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1.1905.1700

1. Check installed version

apt-cache policy racing-gt-evo || rpm -q racing-gt-evo || racing-gt-evo --version

2. No fixed release: DOWNGRADE to a release before 2.1.1905.1700 (Debian / Ubuntu)

apt-cache madison racing-gt-evo sudo apt install racing-gt-evo=<VERSION_BEFORE_2.1.1905.1700> sudo apt-mark hold racing-gt-evo

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

dnf --showduplicates list racing-gt-evo sudo dnf downgrade racing-gt-evo-<VERSION_BEFORE_2.1.1905.1700> sudo dnf versionlock add racing-gt-evo

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-2021-44852?

racing gt evo: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-44852 being exploited?

CVE-2021-44852 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-2021-44852 affect?

CVE-2021-44852 affects racing gt evo. Severity is high (CVSS 7.8). An issue was discovered in BS_RCIO64.sys in Biostar RACING GT Evo 2.1.1905.1700. A low-integrity process can open the driver's device object and issue IOCTLs to read or write to arbitrary physical memory locations (or call an arbitrary addr

How urgent is CVE-2021-44852?

Priority 46/100. High severity; Public exploit reference

References

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