vulnerability
FreeBSD: VID-032aa524-5854-11e6-b334-002590263bf5 (CVE-2016-6258): xen-kernel -- x86: Privilege escalation in PV guests
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:L/AC:L/Au:N/C:C/I:C/A:C) | Aug 2, 2016 | Dec 10, 2025 | Dec 10, 2025 |
Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
Aug 2, 2016
Added
Dec 10, 2025
Modified
Dec 10, 2025
Description
The Xen Project reports: The PV pagetable code has fast-paths for making updates to pre-existing pagetable entries, to skip expensive re-validation in safe cases (e.g. clearing only Access/Dirty bits). The bits considered safe were too broad, and not actually safe. A malicious PV guest administrator can escalate their privilege to that of the host.
Solution
freebsd-upgrade-package-xen-kernel
NEW
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