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. https://git.kernel.org/stable/c/4b9fb2c9039a206d37f215936a4d5bee7b1bf9cd https://git.kernel.org/stable/c/9ccba66d4d2aff9a3909aa77d57ea8b7cc166f3c https://git.kernel.org/stable/c/a84df7c80bdac598d6ac9268ae578da6928883e8 https://git.kernel.org/stable/c/abb07dc5e8b61ab7b1dde20dd73aa01a3aeb183f
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 2266596]
This was fixed for Fedora with the 5.12.4 stable kernel update.
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2024:5101 https://access.redhat.com/errata/RHSA-2024:5101