CVE-2021-28691
7.8 · HIGHOverview
CVE-2021-28691 is a high-severity vulnerability affecting netapp solidfire_baseboard_management_controller. It was published on June 29, 2021 and has a CVSS 3.1 base score of 7.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
Guest triggered use-after-free in Linux xen-netback A malicious or buggy network PV frontend can force Linux netback to disable the interface and terminate the receive kernel thread associated with queue 0 in response to the frontend sending a malformed packet. Such kernel thread termination will lead to a use-after-free in Linux netback when the backend is destroyed, as the kernel thread associated with queue 0 will have already exited and thus the call to kthread_stop will be performed against a stale pointer.
Remediation
Check the references section for vendor advisories and patches from netapp. Update solidfire_baseboard_management_controller to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| linux | linux_kernel | >= 5.5.0, < 5.10.43 | Affected |
Frequently Asked Questions
What is CVE-2021-28691?
CVE-2021-28691 is a high-severity vulnerability affecting netapp solidfire_baseboard_management_controller. It was published on June 29, 2021 and has a CVSS 3.1 base score of 7.8 (HIGH).
How severe is CVE-2021-28691?
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-28691?
Check the references section for vendor advisories and patches from netapp. Update solidfire_baseboard_management_controller to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-28691?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-28691 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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