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CVE-2022-33744

Public on 2022-07-05
Modified on 2022-09-12
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.

Severity
Medium
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CVSS v3 Base Score
4.7
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 kernel 2022-07-28 20:37 ALAS-2022-1624
Amazon Linux 2 - Core kernel 2022-07-19 01:20 ALAS2-2022-1825
Amazon Linux 2 - Kernel-5.10 Extra kernel 2022-07-19 16:01 ALAS2KERNEL-5.10-2022-018
Amazon Linux 2 - Kernel-5.4 Extra kernel 2022-07-19 16:02 ALAS2KERNEL-5.4-2022-033

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv2 1.9 AV:L/AC:M/Au:N/C:N/I:N/A:P
Amazon Linux CVSSv3 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD CVSSv2 1.9 AV:L/AC:M/Au:N/C:N/I:N/A:P
NVD CVSSv3 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H