CVE-2022-33744

2022-07-0500:00:00

ubuntu.com

4.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

1.9 Low

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.0004 Low

EPSS

Percentile

13.3%

JSON

Arm guests can cause Dom0 DoS via PV devices When mapping pages of guests
on Arm, dom0 is using an rbtree to keep track of the foreign mappings.
Updating of that rbtree is not always done completely with the related lock
held, resulting in a small race window, which can be used by unprivileged
guests via PV devices to cause inconsistencies of the rbtree. These
inconsistencies can lead to Denial of Service (DoS) of dom0, e.g. by
causing crashes or the inability to perform further mappings of other
guests’ memory pages.

Notes

Author	Note
sbeattie	according to the Xen advisory, introduced in 3.13.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-194.205UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-128.144UNKNOWN
ubuntu22.04noarchlinux< 5.15.0-48.54UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1142.154UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1086.93UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1020.24UNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1020.24~20.04.1UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1086.93~18.04.1UNKNOWN
ubuntu16.04noarchlinux-aws-hwe< 4.15.0-1142.154~16.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu20.04noarchlinux-azure< 5.4.0-1094.100UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< 4.15.0-194.205	UNKNOWN
ubuntu	20.04	noarch	linux	< 5.4.0-128.144	UNKNOWN
ubuntu	22.04	noarch	linux	< 5.15.0-48.54	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< 4.15.0-1142.154	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1086.93	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1020.24	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< 5.15.0-1020.24~20.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< 5.4.0-1086.93~18.04.1	UNKNOWN
ubuntu	16.04	noarch	linux-aws-hwe	< 4.15.0-1142.154~16.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	20.04	noarch	linux-azure	< 5.4.0-1094.100	UNKNOWN