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CVE-2022-33744

Date: July 5, 2022

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.

Severity Score

Related Resources (9)

https://xenbits.xenproject.org/xsa/advisory-406.txt
http://www.openwall.com/lists/oss-security/2022/07/05/4
http://xenbits.xen.org/xsa/advisory-406.html
https://www.debian.org/security/2022/dsa-5191
https://people.canonical.com/~ubuntu-security/cve/CVE-2022-33744
https://nvd.nist.gov/vuln/detail/CVE-2022-33744
https://security-tracker.debian.org/tracker/CVE-2022-33744
https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html
https://www.mend.io/vulnerability-database/CVE-2022-33744

Severity Score

Weakness Type (CWE)

Insufficient Information

NVD-CWE-noinfo

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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