CVE-2022-33744

 

Published at: - 05-07-2022 03:15

Last modified: - 26-10-2022 01:44

Total changes: - 6

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.

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

Reference

• https://xenbits.xenproject.org/xsa/advisory-406.txt
• http://xenbits.xen.org/xsa/advisory-406.html
• [oss-security] 20220705 Xen Security Advisory 406 v3 (CVE-2022-33744) - Arm guests can cause Dom0 DoS via PV devices-Mailing List, Patch, Third Party Advisory
• DSA-5191-
• [debian-lts-announce] 20221002 [SECURITY] [DLA 3131-1] linux security update-

 

Keywords

NVD

 

CVE-2022-33744

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures