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.
References (5)
Core 5
Core References
Vendor Advisory x_refsource_misc
https://xenbits.xenproject.org/xsa/advisory-406.txt
Patch, Vendor Advisory x_refsource_confirm
http://xenbits.xen.org/xsa/advisory-406.html
Mailing List, Patch, Third Party Advisory mailing-list
x_refsource_mlist
http://www.openwall.com/lists/oss-security/2022/07/05/4
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2022/dsa-5191
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html
Scores
CVSS v3
4.7
EPSS
0.0008
EPSS Percentile
22.8%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Details
Status
published
Products (3)
debian/debian_linux
10.0
debian/debian_linux
11.0
linux/linux_kernel
3.13 - 5.18
Published
Jul 05, 2022
Tracked Since
Feb 18, 2026