// For flags

CVE-2021-47018

powerpc/64: Fix the definition of the fixmap area

Severity Score

3.2
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

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.

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.

A flaw was found in the Linux kernel. The fixmap area that was defined for the PPC64 architecture was invalid.

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.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
Low
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-02-27 CVE Reserved
  • 2024-02-28 CVE Published
  • 2024-12-19 CVE Updated
  • 2025-01-09 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-20: Improper Input Validation
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.5 < 5.10.37
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.10.37"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.5 < 5.11.21
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.11.21"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.5 < 5.12.4
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.12.4"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.5 < 5.13
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.13"
en
Affected