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LIN1021-7505 : Security Advisory - linux - CVE-2021-47018

Created: Feb 28, 2024    Updated: Mar 26, 2024
Resolved Date: Mar 26, 2024
Found In Version: 10.21.20.1
Severity: Standard
Applicable for: Wind River Linux LTS 21
Component/s: Kernel

Description

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.

CREATE(Triage):(User=admin) CVE-2021-47018 (https://nvd.nist.gov/vuln/detail/CVE-2021-47018)
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