CVE-2022-33744
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.
Does this matter?
Lower severity and a low EPSS score (0.31%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 4.7 MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.31% probability · 24th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel · debian/debian linux
- Source
- security@xen.org
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.