Riskcovery

CVE-2021-47018

powerpc/64: Fix the definition of the fixmap area

State
Published
Severity
Not scored
Published
Feb 28, 2024
Updated
May 11, 2026
Reserved
Feb 27, 2024

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

powerpc/64: Fix the definition of the fixmap area

At the time being, the fixmap area is defined at the top of the address space or just below KASAN.

This definition is not valid for PPC64.

For PPC64, use the top of the I/O space.

Because of circular dependencies, it is not possible to include asm/fixmap.h in asm/book3s/64/pgtable.h , so define a fixed size AREA at the top of the I/O space for fixmap and ensure during build that the size is big enough.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 265c3491c4bc8d40587996d6ee2f447a7ccfb4f3 to before 4b9fb2c9039a206d37f215936a4d5bee7b1bf9cdAffected
  • 265c3491c4bc8d40587996d6ee2f447a7ccfb4f3 to before abb07dc5e8b61ab7b1dde20dd73aa01a3aeb183fAffected
  • 265c3491c4bc8d40587996d6ee2f447a7ccfb4f3 to before a84df7c80bdac598d6ac9268ae578da6928883e8Affected
  • 265c3491c4bc8d40587996d6ee2f447a7ccfb4f3 to before 9ccba66d4d2aff9a3909aa77d57ea8b7cc166f3cAffected
LinuxLinux
  • 5.5Affected
  • before 5.5Not affected
  • 5.10.37 through 5.10.*Not affected
  • 5.11.21 through 5.11.*Not affected
  • 5.12.4 through 5.12.*Not affected
  • 5.13 and laterNot affected

References

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