Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.5, < 5.10.37 |
References
- https://git.kernel.org/stable/c/4b9fb2c9039a206d37f215936a4d5bee7b1bf9cdPatch
- https://git.kernel.org/stable/c/9ccba66d4d2aff9a3909aa77d57ea8b7cc166f3cPatch
- https://git.kernel.org/stable/c/a84df7c80bdac598d6ac9268ae578da6928883e8Patch
- https://git.kernel.org/stable/c/abb07dc5e8b61ab7b1dde20dd73aa01a3aeb183fPatch
- https://git.kernel.org/stable/c/4b9fb2c9039a206d37f215936a4d5bee7b1bf9cdPatch
- https://git.kernel.org/stable/c/9ccba66d4d2aff9a3909aa77d57ea8b7cc166f3cPatch
- https://git.kernel.org/stable/c/a84df7c80bdac598d6ac9268ae578da6928883e8Patch
- https://git.kernel.org/stable/c/abb07dc5e8b61ab7b1dde20dd73aa01a3aeb183fPatch
FAQ
What is CVE-2021-47018?
CVE-2021-47018 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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...
How severe is CVE-2021-47018?
CVE-2021-47018 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-47018?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.