CVE-2021-47018
powerpc/64: Fix the definition of the fixmap area
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
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.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-02-27 CVE Reserved
- 2024-02-28 CVE Published
- 2024-02-29 EPSS Updated
- 2024-09-11 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-20: Improper Input Validation
CAPEC
References (7)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/265c3491c4bc8d40587996d6ee2f447a7ccfb4f3 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2021-47018 | 2024-08-08 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2266594 | 2024-08-08 |
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
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| 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
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| 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
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| 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
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