CVEvulnerability
CVE-2026-23558
7.8 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-05-19
- Last modified
- 2026-10-14
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 7.8 HIGH — CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- CWE-362
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.
Affected configurations
• xen xen (>= 4.0.0)
Related
Weakness · CWE (1)
- CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization weakness
References
- https://xenbits.xenproject.org/xsa/advisory-486.html Mitigation, Patch, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/04/28/13 Mailing List, Mitigation, Patch, Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-486.html Mitigation, Patch, Vendor Advisory