Description
The adjustments made for XSA-379 as well as those subsequently becoming XSA-387 still left a race window, when a HVM or PVH guest does a grant table version change from v2 to v1 in parallel with mapping the status page(s) via XENMEM_add_to_physmap. Some of the status pages may then be freed while mappings of them would still be inserted into the guest's secondary (P2M) page tables.
References (3)
Core 3
Core References
Various Sources
http://xenbits.xen.org/xsa/advisory-486.html
Scores
CVSS v3
7.8
EPSS
0.0001
EPSS Percentile
1.4%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-362
Status
published
Products (2)
xen/xen
4.0.0
Xen/Xen
consult Xen advisory XSA-486
Published
May 19, 2026
Tracked Since
May 19, 2026