CVE-2017-14319

High

Description

A grant unmapping issue was discovered in Xen through 4.9.x. When removing or replacing a grant mapping, the x86 PV specific path needs to make sure page table entries remain in sync with other accounting done. Although the identity of the page frame was validated correctly, neither the presence of the mapping nor page writability were taken into account.

SeverityHigh

CVSS8.8

Exploit probability—

ProductXen

PublishedSep 12, 2017

First seenSep 12, 2017

How to fix

Vendor advisories

debian.org/security/2017/dsa-4050

Affected products

Product	Affected versions	Fixed in
xen xen	v ≤ 4.9.0	—

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