CVE-2021-47623

CVE-2021-47623 affects the PowerPC path in the Linux kernel where unmapping a fixmap entry via __set_fixmap() (FIXMAP_PAGE_CLEAR) ends up calling map_kernel_page(), which fails if invoked a second time for the same page. The connected documents confirm the root cause in arch/powerpc/mm/pgtable.c ...

CVE-2021-47623

In the Linux kernel, the following vulnerability has been resolved: powerpc/fixmap: Fix VM debug warning on unmap Unmapping a fixmap entry is done by calling setfixmap with FIXMAPPAGECLEAR as flags. Today, powerpc setfixmap calls mapkernelpage. mapkernelpage is not happy when called a second time...

CVE-2021-47623: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: powerpc/fixmap: Fix VM debug warning on unmap Unmapping a fixmap entry is done by calling setfixmap with FIXMAPPAGECLEAR as flags. Today, powerpc setfixmap calls mapkernelpage. mapkernelpage is not happy when called a second time...

The vulnerability of the kmap_local() function in the Linux operating system’s kernel allows a hacker to cause a service failure.

The vulnerability of the kmaplocal function in the Linux operating system’s kernel is related to the doubling of the number of fixmap slots allocated for each processor that are used by kmaplocal. Exploiting this vulnerability can allow an attacker to cause a service failure...

SUSE CVE-2021-47018

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...

CVE-2021-47018

A flaw was found in the Linux kernel. The fixmap area that was defined for the PPC64 architecture was invalid. Mitigation Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment,...

CVE-2021-47018

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...

DEBIAN-CVE-2021-47018

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...

CVE-2021-47018

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...

Spoofing

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...

UBUNTU-CVE-2021-47018

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...

CVE-2021-47018

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...

CVE-2021-47018 powerpc/64: Fix the definition of the fixmap area

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...

CVE-2021-47018 powerpc/64: Fix the definition of the fixmap area

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...

CVE-2021-47018

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...

CVE-2021-47018

CVE-2021-47018 – Mode C (details available) Affected software: Linux kernel on PPC64 (powerpc/64). Issue: PPC64 fixmap area was defined at the top of the address space or just below KASAN, which is not valid for PPC64. The fix implements using the top of the I/O space for the fixmap area, with a ...

SUSE CVE-2021-46910

In the Linux kernel, the following vulnerability has been resolved: ARM: 9063/1: mm: reduce maximum number of CPUs if DEBUGKMAPLOCAL is enabled The debugging code for kmaplocal doubles the number of per-CPU fixmap slots allocated for kmaplocal, in order to use half of them as guard regions. This...

Linux kernel security vulnerabilities

Linux kernel is the kernel used by the Linux Foundation's open source operating system Linux. A security vulnerability exists in the Linux kernel due to an improperly set fixmap region size...

CVE-2021-47018: Undefined Security Weakness

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...

CVE-2021-46910

A flaw was found in kmaplocal in the Linux Kernel that doubles the number of per-CPU fixmap slots allocated for kmaplocal. This causes the fixmap region to grow downwards beyond the start of its reserved window if the supported number of CPUs is large, eventually colliding with the newly added...