CVE-2022-39188: Debian Linux

Medium severity, CVSS 4.7. EPSS: 0.2% chance of exploitation in the next 30 days.

An issue was discovered in include/asm-generic/tlb.h in the Linux kernel before 5.19. Because of a race condition (unmap_mapping_range versus munmap), a device driver can free a page while it still has stale TLB entries. This only occurs in situations with VM_PFNMAP VMAs.

Affected products

• Debian Debian Linux: version 10.0 only; version 11.0 only
• Linux Linux Kernel: before 5.19 (fixed in 5.19)

Published 2022-09-02. Last modified 2026-06-17.