Medium severity4.3NVD Advisory· Published Sep 8, 2026· Updated Sep 8, 2026
CVE-2026-79603
CVE-2026-79603
Description
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.
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Affected products
1Patches
Vulnerability mechanics
References
2News mentions
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