CVE-2022-50230

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-50230
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-50230.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-50230
Downstream
Published
2025-06-18T11:15:54Z
Modified
2025-06-18T16:01:33Z
Summary
[none]
Details

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 FEATEPAN, read/write access to the idmap is denied because UXN is not set on the swapper PTEs. As a result, idmapkptiinstallngmappings panics the kernel when accessing _idmapkptiflag. Fix it by setting UXN on these PTEs.

References

Affected packages

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.19.6-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.19.6-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}