A AegiFlow
MEDIUMCVSS 4.3

CVE-2026-79603

CVE-2026-79603 updated by NVD

Modified
2026-09-10
Sources
nvd

Summary

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.

References

Includes data from the National Vulnerability Database (NIST). NVD data is in the public domain; this page is not endorsed by NIST.

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