Security readout for executives and security teams
Plain-English summary
CVE-2021-47789 is a denial-of-service flaw in the Yenkee Hornet Gaming Mouse driver GM312Fltr.sys. Malformed oversized input can crash the operating system at kernel level. The documented impact is availability loss, not data theft or privilege escalation. Public proof-of-concept material exists, but the provided sources do not show active exploitation.
Executive priority
Address this as a targeted endpoint availability risk. It is unlikely to affect core business systems unless the driver is installed, but public PoC availability makes unmanaged workstations and permissive peripheral policies higher concern.
Technical view
GM312Fltr.sys contains a CWE-121 stack buffer overrun reachable through driver I/O handling. The source bundle says oversized DeviceIoControl input can trigger a kernel crash. CVSS 3.1 is 7.5 high, with availability impact only. Affected scope is listed as all versions of the Yenkee Hornet Gaming Mouse driver.
Likely exposure
Exposure is likely limited to systems with the Yenkee Hornet Gaming Mouse driver GM312Fltr.sys installed. This is most relevant to user workstations, gaming endpoints, labs, or bring-your-own-peripheral environments. Evidence does not identify server-side software exposure.
Exploitation context
ExploitDB and the Quadron repository publish proof-of-concept material. The CVE is not marked in CISA KEV in the provided bundle. Sources support denial of service through kernel crash, not confirmed code execution. Attack-surface details need validation because the CVSS vector says network, while the description references DeviceIoControl driver interaction.
Researcher notes
Do not assume active exploitation from PoC publication alone. The provided data has an attack-vector ambiguity: CVSS lists network access, while the technical description centers on DeviceIoControl. Validate local driver exposure, loaded driver versions, and vendor update status before assigning enterprise-wide urgency.
Mitigation direction
- Check Yenkee or trusted advisory sources for updated driver guidance.
- Remove or disable the affected driver where the device is not business-required.
- Restrict use of non-standard gaming peripherals on managed endpoints.
- Prioritize remediation for shared, kiosk, lab, or high-availability workstations.
- Monitor endpoints for unexplained kernel crashes involving GM312Fltr.sys.
Validation and detection
- Inventory endpoints for the GM312Fltr.sys driver.
- Identify users or assets using Yenkee Hornet Gaming Mouse hardware.
- Review EDR, crash dumps, or reliability logs for GM312Fltr.sys faults.
- Confirm whether vendor updates or replacement drivers are available.
- Document exceptions where the driver must remain installed.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-121: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-47789 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-50311CVE reference · exploit
- Yenkee Vendor WebpageCVE reference · product
- Quadron Research Lab Kernel Driver Bugs RepositoryCVE reference · technical-description, exploit
- VulnCheck Advisory: Yenkee Hornet Gaming Mouse - 'GM312Fltr.sys' Denial of Service (PoC)CVE reference · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Stack-based Buffer Overflow
Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.