CVE-2021-46968

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

27/02/2024

Last modified:

08/01/2025

Description

In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: fix zcard and zqueue hot-unplug memleak Tests with kvm and a kmemdebug kernel showed, that on hot unplug the zcard and zqueue structs for the unplugged card or queue are not properly freed because of a mismatch with get/put for the embedded kref counter. This fix now adjusts the handling of the kref counters. With init the kref counter starts with 1. This initial value needs to drop to zero with the unregister of the card or queue to trigger the release and free the object.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	5.10 (including)	5.10.36 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.11.20 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.12 (including)	5.12.3 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2021-46968

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools