Title: CVE-2021-42739 Linux kernel vulnerability in StarWind products

Note: StarWind will continue to update this vulnerability as new information becomes available.

Vulnerability ID: SW-20220804-0001

Version: 1.0

Date: 2022-08-04

Status: Final

CVEs: CVE-2021-42739


A heap-based buffer overflow flaw was found in the Linux kernel FireDTV media card driver, where the user calls the CA_SEND_MSG ioctl. This flaw allows a local user of the host machine to crash the system or escalate privileges on the system. The highest threat from this vulnerability is confidentiality, integrity, as well as system availability.


A heap-based buffer overflow flaw.

Vulnerability Scoring

CVE CVSS 2.0 Score CVSS 3.x Score
CVE-2021-42739 4.6 (MEDIUM) 6.7 (MEDIUM)




Resource Hyperlink
NVD https://nvd.nist.gov/vuln/detail/CVE-2021-42739


Affected Products:

StarWind SAN&NAS (vSAN) V8 R12

StarWind VSAN Version V8 (build 14338)

Not affected products:

StarWind SAN&NAS (all previous versions)

StarWind VSAN (all previous versions)

StarWind Command Center (any setup)

StarWind VTLA (any setup)

StarWind VTL component (all versions for Windows Server)

StarWind V2V (all versions)

StarWind Tape Redirector component (all versions)

StarWind Deduplication Analyzer (all versions)

StarWind rPerf (all versions)

StarWind iSCSI Accelerator (all versions)

StarWind NVMe-oF Initiator (all versions)

StarWind SA (any setup)

Software Versions and Fixes

Fixed in StarWind SAN & NAS v8 R13

Fixed in StarWind VSAN Version V8 (build 14398)


Update StarWind SAN & NAS to the build v8 R13 or higher

Update StarWind VSAN Version V8 (build 14398) or higher

Obtaining Software Fixes 

Software updates will be available in StarWind release notes – https://www.starwindsoftware.com/release-notes-build. To update the software, perform the steps described at the following link  – https://knowledgebase.starwindsoftware.com/guidance/upgrading-from-any-starwind-version-to-any-starwind-version/ or contact support to perform an update. You can submit a support request using the following link https://www.starwindsoftware.com/support-form or contact Support directly via email support@starwind.com or via phone +1 617 829 4499.

Status of Notice

Final for VSAN

Final for SAN&NAS

StarWind will continue to update information regarding this vulnerability as new details become available.

This vulnerability article should be considered as the single source of current, up-to-date, authorized and accurate information posted by StarWind Software.

Revision History 

Revision # Date Comments
1.0 2022-08-04 Initial Public Release and Final Status