CVE-2022-50232

In the Linux kernel, the following vulnerability has been resolved: arm64: set UXN on swapper page tables [ This issue was fixed upstream by accident in c3cee924bd85 ("arm64: head: cover entire kernel image in initial ID map") as part of a large refactoring of the arm64 boot flow. This simple fix is therefore preferred for -stable backporting ] On a system that implements FEAT_EPAN, read/write access to the idmap is denied because UXN is not set on the swapper PTEs. As a result, idmap_kpti_install_ng_mappings panics the kernel when accessing __idmap_kpti_flag. Fix it by setting UXN on these PTEs.

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/775871d4be0d75e219cca937af843a4a1b60489a	Patch
https://git.kernel.org/stable/c/c3cee924bd855184d15bc4aa6088dcf8e2c1394c	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

19 Nov 2025, 12:57

Type	Values Removed	Values Added
CWE		NVD-CWE-noinfo
CPE		cpe:2.3:o:linux:linux_kernel::::::::
First Time		Linux linux Kernel Linux
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.5
References	~~() https://git.kernel.org/stable/c/775871d4be0d75e219cca937af843a4a1b60489a -~~	() https://git.kernel.org/stable/c/775871d4be0d75e219cca937af843a4a1b60489a - Patch
References	~~() https://git.kernel.org/stable/c/c3cee924bd855184d15bc4aa6088dcf8e2c1394c -~~	() https://git.kernel.org/stable/c/c3cee924bd855184d15bc4aa6088dcf8e2c1394c - Patch

Information

Published : 2025-06-18 11:15

Updated : 2025-11-19 12:57

NVD link : CVE-2022-50232

Mitre link : CVE-2022-50232

CVE.ORG link : CVE-2022-50232

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

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