VDB
CVE-2026-79603
CVE-2026-79603
PUBLISHED
CVSS 4.3 MEDIUM
Reported by XEN · Published September 8, 2026
x86 PV guests can free memory pages while still keeping a stale TLB entry pointing to them. A TLB flush is only issued by Xen (if needed) when the page is re-used. Since it's possible for the page to be scrubbed ahead of the TLB flush, there's a window where a PV guest can modify an already scrubbed page.
Risk Scores
CVSS 3.1
4.3
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xen | Xen | consult Xen advisory XSA-511 |
| Xen | Xen | consult Xen advisory XSA-511 |
Timeline
- Sep 8, 2026 Coalition ESS Score
- Sep 8, 2026 CVE Published
- Sep 8, 2026 CVE Updated
- Sep 9, 2026 EPSS Score
- Sep 12, 2026 EPSS Score
- Sep 17, 2026 EPSS Score
- Sep 18, 2026 EPSS Score