CVE-2020-11741: Debian Linux

High severity, CVSS 8.8. EPSS: 0.4% chance of exploitation in the next 30 days.

An issue was discovered in xenoprof in Xen through 4.13.x, allowing guest OS users (with active profiling) to obtain sensitive information about other guests, cause a denial of service, or possibly gain privileges. For guests for which "active" profiling was enabled by the administrator, the xenoprof code uses the standard Xen shared ring structure. Unfortunately, this code did not treat the guest as a potential adversary: it trusts the guest not to modify buffer size information or modify head / tail pointers in unexpected ways. This can crash the host (DoS). Privilege escalation cannot be ruled out.

Affected products

• Debian Debian Linux: version 10.0 only
• Fedoraproject Fedora: version 30 only; version 31 only; version 32 only
• Opensuse Leap: version 15.1 only
• Xen Xen: up to and including 4.13.0; version 4.13.0 only

Published 2020-04-14. Last modified 2026-06-17.