CVE-2019-17347: Debian Linux

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service or gain privileges because a guest can manipulate its virtualised %cr4 in a way that is incompatible with Linux (and possibly other guest kernels).

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only
• Xen Xen: from 4.1.0, up to and including 4.11.2

Published 2019-10-08. Last modified 2026-06-17.