Cloudanix VulnDB

CVE-2026-79603

Medium · 4.3

CVSS

4.3

EPSS

0.2%

Published

Sep 8, 2026

CISA due date

—

The record

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.

Affected packages

Ecosystem Package Introduced Fixed

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