race in VT-d domain ID cleanup Xen domain IDs are up to 15 bits wide. VT-d hardware may allow for only less than 15 bits to hold a domain ID associating a physical device with a particular domain. Therefore internally Xen domain IDs are mapped to the smaller value range. The cleaning up of the housekeeping structures has a race, allowing for VT-d domain IDs to be leaked and flushes to be bypassed.
https://xenbits.xenproject.org/xsa/advisory-399.txt
http://xenbits.xen.org/xsa/advisory-399.html
http://www.openwall.com/lists/oss-security/2022/04/05/2
Source: MITRE
Published: 2022-04-05
Updated: 2022-07-01
Type: CWE-362
Base Score: 6.2
Vector: AV:L/AC:H/Au:N/C:C/I:C/A:C
Impact Score: 10
Exploitability Score: 1.9
Severity: MEDIUM
Base Score: 7
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 1
Severity: HIGH