Go to homepageCyberStrike

Menu

Star on GitHub · 3.4k
Sign inDownload

CVE-2022-33744

4.7 · MEDIUM

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.

Published Jul 5, 2022EPSS 0.31%

Overview

CVE-2022-33744 is a medium-severity vulnerability. It was published on July 5, 2022 and has a CVSS 3.1 base score of 4.7 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.openwall.com/lists/oss-security/2022/07/05/4Refxenbits.xen.org/xsa/advisory-406.htmlReflists.debian.org/debian-lts-announce/2022/10/msg00000.htmlRefwww.debian.org/security/2022/dsa-5191Refxenbits.xenproject.org/xsa/advisory-406.txtRefwww.openwall.com/lists/oss-security/2022/07/05/4Refxenbits.xen.org/xsa/advisory-406.htmlReflists.debian.org/debian-lts-announce/2022/10/msg00000.htmlRefwww.debian.org/security/2022/dsa-5191Refxenbits.xenproject.org/xsa/advisory-406.txt

How CyberStrike helps

Frequently asked questions

What is CVE-2022-33744?

CVE-2022-33744 is a medium-severity vulnerability. It was published on July 5, 2022 and has a CVSS 3.1 base score of 4.7 (MEDIUM).

How severe is CVE-2022-33744?

This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-33744?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-33744?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-33744 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related MEDIUM CVEs from 2022

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999
Watch the demo →