CVE-2021-47018

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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. 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 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/4b9fb2c9039a206d37f215936a4d5bee7b1bf9cd Patch
https://git.kernel.org/stable/c/9ccba66d4d2aff9a3909aa77d57ea8b7cc166f3c Patch
https://git.kernel.org/stable/c/a84df7c80bdac598d6ac9268ae578da6928883e8 Patch
https://git.kernel.org/stable/c/abb07dc5e8b61ab7b1dde20dd73aa01a3aeb183f Patch
https://git.kernel.org/stable/c/4b9fb2c9039a206d37f215936a4d5bee7b1bf9cd Patch
https://git.kernel.org/stable/c/9ccba66d4d2aff9a3909aa77d57ea8b7cc166f3c Patch
https://git.kernel.org/stable/c/a84df7c80bdac598d6ac9268ae578da6928883e8 Patch
https://git.kernel.org/stable/c/abb07dc5e8b61ab7b1dde20dd73aa01a3aeb183f Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

08 Jan 2025, 16:53

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux
Linux linux Kernel
CWE NVD-CWE-noinfo
References () https://git.kernel.org/stable/c/4b9fb2c9039a206d37f215936a4d5bee7b1bf9cd - () https://git.kernel.org/stable/c/4b9fb2c9039a206d37f215936a4d5bee7b1bf9cd - Patch
References () https://git.kernel.org/stable/c/9ccba66d4d2aff9a3909aa77d57ea8b7cc166f3c - () https://git.kernel.org/stable/c/9ccba66d4d2aff9a3909aa77d57ea8b7cc166f3c - Patch
References () https://git.kernel.org/stable/c/a84df7c80bdac598d6ac9268ae578da6928883e8 - () https://git.kernel.org/stable/c/a84df7c80bdac598d6ac9268ae578da6928883e8 - Patch
References () https://git.kernel.org/stable/c/abb07dc5e8b61ab7b1dde20dd73aa01a3aeb183f - () https://git.kernel.org/stable/c/abb07dc5e8b61ab7b1dde20dd73aa01a3aeb183f - Patch

21 Nov 2024, 06:35

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc/64: corrige la definición del área de fixmap Por el momento, el área de fixmap está definida en la parte superior del espacio de direcciones o justo debajo de KASAN. Esta definición no es válida para PPC64. Para PPC64, utilice la parte superior del espacio de E/S. Debido a dependencias circulares, no es posible incluir asm/fixmap.h en asm/book3s/64/pgtable.h, así que defina un ÁREA de tamaño fijo en la parte superior del espacio de E/S para fixmap y asegúrese durante la compilación de que el El tamaño es lo suficientemente grande.
References () https://git.kernel.org/stable/c/4b9fb2c9039a206d37f215936a4d5bee7b1bf9cd - () https://git.kernel.org/stable/c/4b9fb2c9039a206d37f215936a4d5bee7b1bf9cd -
References () https://git.kernel.org/stable/c/9ccba66d4d2aff9a3909aa77d57ea8b7cc166f3c - () https://git.kernel.org/stable/c/9ccba66d4d2aff9a3909aa77d57ea8b7cc166f3c -
References () https://git.kernel.org/stable/c/a84df7c80bdac598d6ac9268ae578da6928883e8 - () https://git.kernel.org/stable/c/a84df7c80bdac598d6ac9268ae578da6928883e8 -
References () https://git.kernel.org/stable/c/abb07dc5e8b61ab7b1dde20dd73aa01a3aeb183f - () https://git.kernel.org/stable/c/abb07dc5e8b61ab7b1dde20dd73aa01a3aeb183f -

28 Feb 2024, 09:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-02-28 09:15

Updated : 2025-01-08 16:53

NVD link : CVE-2021-47018

Mitre link : CVE-2021-47018

CVE.ORG link : CVE-2021-47018

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo