CVEvulnerability
CVE-2026-79603
4.3 MEDIUM
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-09-08
- Last modified
- 2026-09-08
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Weaknesses
- CWE-664
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.
Related
Weakness · CWE (1)
- CWE-664 Improper Control of a Resource Through its Lifetime weakness
References
- https://xenbits.xenproject.org/xsa/advisory-511.html xenbits.xenproject.org
- http://www.openwall.com/lists/oss-security/2026/09/08/8 www.openwall.com
- http://xenbits.xen.org/xsa/advisory-511.html xenbits.xen.org