CVE-2021-28688 Detail

Current Description

The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. This initialization went too far and may under certain conditions also overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died, leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable. XSA-365 was classified to affect versions back to at least 3.11.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  6.5 MEDIUM
Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H


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Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://xenbits.xenproject.org/xsa/advisory-371.txt Patch  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-665 Improper Initialization cwe source acceptance level NIST  

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Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-28688
NVD Published Date:
04/06/2021
NVD Last Modified:
04/15/2021
Source:
Xen Project