CVE-2022-33744

medium

Description

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.

References

https://xenbits.xenproject.org/xsa/advisory-406.txt

https://www.debian.org/security/2022/dsa-5191

https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html

http://xenbits.xen.org/xsa/advisory-406.html

http://www.openwall.com/lists/oss-security/2022/07/05/4

Details

Source: Mitre, NVD

Published: 2022-07-05

Risk Information

CVSS v2

Base Score: 1.9

Vector: CVSS2#AV:L/AC:M/Au:N/C:N/I:N/A:P

Severity: Low

CVSS v3

Base Score: 4.7

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium