CVE-2021-47018

powerpc/64: Fix the definition of the fixmap area

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.

5.5

CVSS

Severity: Medium

CVSS 3.1 •

EPSS 0.01%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/4b9fb2c9039a206d37f215936a4d5bee7b1bf9cd	patch
https://git.kernel.org/stable/c/abb07dc5e8b61ab7b1dde20dd73aa01a3aeb183f	patch
https://git.kernel.org/stable/c/a84df7c80bdac598d6ac9268ae578da6928883e8	patch
https://git.kernel.org/stable/c/9ccba66d4d2aff9a3909aa77d57ea8b7cc166f3c	patch

Frequently Asked Questions

What is the severity of CVE-2021-47018?: CVE-2021-47018 has been scored as a medium severity vulnerability.
How to fix CVE-2021-47018?: To fix CVE-2021-47018, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-47018 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-47018 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-47018?: CVE-2021-47018 affects Linux Linux, Linux Linux.

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