CVE-2021-33098

2022-03-2418:23:57

redhat.com

access.redhat.com

linux kernel

attacker

crash

virtualized pcie device

mtu

vulnerability

CVSS2

4.9

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:N/I:N/A:C

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

Percentile

12.6%

JSON

A flaw was found in the Linux kernel. This flaw allows an attacker who can modify the MTU of a virtualized PCIe device (in a guest, for example) to crash the host system’s kernel if they set the MTU of the VF device to an unsupported value.

Mitigation

Mitigation for this issue is either not available or the currently available options does not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.