CVE-2022-33744

Name: CVE-2022-33744
Creator: NVD / NIST
Published: 2022-07-05T13:15:08.653+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.7/10EPSS 0.30%

Last modified Jun 17, 2026

CVE-2022-33744 is a medium-severity vulnerability rated 4.7/10 on the CVSS scale. 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. EPSS estimates a 0.30% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.7/10

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

EPSS Probability

0.30%

21.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 3.13, <= 5.18
Debian	Debian Linux	10.0
Debian	Debian Linux	11.0

References

http://www.openwall.com/lists/oss-security/2022/07/05/4Mailing List, Patch, Third Party Advisory
http://xenbits.xen.org/xsa/advisory-406.htmlPatch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00000.htmlMailing List, Third Party Advisory
https://www.debian.org/security/2022/dsa-5191Third Party Advisory
https://xenbits.xenproject.org/xsa/advisory-406.txtVendor Advisory
http://www.openwall.com/lists/oss-security/2022/07/05/4Mailing List, Patch, Third Party Advisory
http://xenbits.xen.org/xsa/advisory-406.htmlPatch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00000.htmlMailing List, Third Party Advisory
https://www.debian.org/security/2022/dsa-5191Third Party Advisory
https://xenbits.xenproject.org/xsa/advisory-406.txtVendor Advisory

Timeline

Published: Jul 5, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-33744?

How severe is CVE-2022-33744?

CVE-2022-33744 has a CVSS score of 4.7/10 (MEDIUM severity). The EPSS model estimates a 0.30% probability of exploitation in the next 30 days.

How do I fix CVE-2022-33744?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-33744?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST