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Red Hat: CVE-2022-39188: unmap_mapping_range() race with munmap() on VM_PFNMAP mappings leads to stale TLB entry (Multiple Advisories)

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Red Hat: CVE-2022-39188: unmap_mapping_range() race with munmap() on VM_PFNMAP mappings leads to stale TLB entry (Multiple Advisories)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
09/02/2022
Created
05/15/2023
Added
05/15/2023
Modified
03/13/2024

Description

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.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

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