7.8

CVE-2026-23558

grant table v2 race in status page mapping

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Xen ≫ Xen Version >= 4.0.0
VulnDex Vulnerability Enrichment
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.12% 0.02
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
134c704f-9b21-4f2e-91b3-4a467353bcc0 7.8 1.1 6
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

https://xenbits.xenproject.org/xsa/advisory-486.html
Patch
Vendor Advisory
Mitigation
http://www.openwall.com/lists/oss-security/2026/04/28/13
Patch
Third Party Advisory
Mailing List
Mitigation
http://xenbits.xen.org/xsa/advisory-486.html
Patch
Vendor Advisory
Mitigation