CVE-2021-47567

In the Linux kernel, the following vulnerability has been resolved: powerpc/32: Fix hardlockup on vmap stack overflow Since the commit c118c7303ad5 ("powerpc/32: Fix vmap stack - Do not activate MMU before reading task struct") a vmap stack overflow results in a hard lockup. This is because emergency_ctx is still addressed with its virtual address allthough data MMU is not active anymore at that time. Fix it by using a physical address instead.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

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/5bb60ea611db1e04814426ed4bd1c95d1487678e	Patch
https://git.kernel.org/stable/c/c4e3ff8b8b1d54f0c755670174c453b06e17114b	Patch
https://git.kernel.org/stable/c/dfe906da9a1abebdebe8b15bb3e66a2578f6c4c7	Patch
https://git.kernel.org/stable/c/5bb60ea611db1e04814426ed4bd1c95d1487678e	Patch
https://git.kernel.org/stable/c/c4e3ff8b8b1d54f0c755670174c453b06e17114b	Patch
https://git.kernel.org/stable/c/dfe906da9a1abebdebe8b15bb3e66a2578f6c4c7	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:5.16:rc1::::::
	cpe:2.3:o:linux:linux_kernel:5.16:rc2::::::

History

No history.

Information

Published : 2024-05-24 15:15

Updated : 2025-09-18 15:47

NVD link : CVE-2021-47567

Mitre link : CVE-2021-47567

CVE.ORG link : CVE-2021-47567

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

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