CVE-2021-38198: Debian Linux

Medium severity, CVSS 5.5. EPSS: 0.5% chance of exploitation in the next 30 days.

arch/x86/kvm/mmu/paging_tmpl.h in the Linux kernel before 5.12.11 incorrectly computes the access permissions of a shadow page, leading to a missing guest protection page fault.

Affected products

• Debian Debian Linux: version 9.0 only
• Linux Linux Kernel: before 5.12.11 (fixed in 5.12.11)

Published 2021-08-08. Last modified 2026-10-08.