CVE Details

Release Date:2021-04-06


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.

See more information about CVE-2021-28688 from MITRE CVE dictionary and NIST NVD

CVSS v3.0 metrics

NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score: 6.5 Base Metrics: AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Access Vector: Local network Attack Complexity: Low
Privileges Required: Low User Interaction: None
Scope: Changed Confidentiality Impact: None
Integrity Impact: None Availability Impact: High

Errata information

PlatformErrataRelease Date
Oracle Linux version 6 (kernel-uek)ELSA-2021-92152021-05-06
Oracle Linux version 7 (kernel-uek)ELSA-2021-92152021-05-06
Oracle Linux version 7 (kernel-uek)ELSA-2021-92202021-05-10
Oracle Linux version 7 (kernel-uek)ELSA-2021-92222021-05-10
Oracle Linux version 7 (kernel-uek-container)ELSA-2021-92212021-06-01
Oracle Linux version 7 (kernel-uek-container)ELSA-2021-92232021-05-10
Oracle Linux version 8 (kernel-uek)ELSA-2021-92202021-05-10
Oracle Linux version 8 (kernel-uek-container)ELSA-2021-92212021-06-01
Oracle VM version 3 (kernel-uek)OVMSA-2021-00162021-05-06

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team