Bugzilla – Bug 1220774
VUL-0: CVE-2021-47018: kernel: powerpc/64: Fix the definition of the fixmap area
Last modified: 2024-04-05 16:04:36 UTC
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. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47018 https://www.cve.org/CVERecord?id=CVE-2021-47018 https://bugzilla.redhat.com/show_bug.cgi?id=2266594 https://lore.kernel.org/linux-cve-announce/2024022832-CVE-2021-47018-f631@gregkh/T/#u Patch: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=9ccba66d4d2a
Closing since: -code streams below cve/linux-5.14 are not affected -cve/linux-5.14, stable and SLE15-SP6 are already patched
This was broken in Linux 5.5 and fixed in 5.13. We don't have any kernel released in that range.