CVEvulnerability

CVE-2021-28688

6.5 MEDIUM Published 2021-04-06 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-04-06
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
CVSS 2.0 ([email protected])
2.1 LOW — AV:L/AC:L/Au:N/C:N/I:N/A:P
Weaknesses
CWE-665

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.

Affected configurations

• linux linux kernel (>= 3.11 <= 5.10.18) • debian debian linux 9.0

Related

Weakness · CWE (1)

  • CWE-665 Improper Initialization weakness

References