CVE-2022-50232

MEDIUM

5.5

Description

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.

Details CVE

Score CVSS v3.15.5

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Vecteur d'attaqueLOCAL

ComplexiteLOW

Privileges requisLOW

Interaction utilisateurNONE

Publie6/18/2025

Derniere modification11/19/2025

Sourcenvd

Observations honeypot0

Produits affectes

linux:linux_kernel

References

https://git.kernel.org/stable/c/775871d4be0d75e219cca937af843a4a1b60489a(416baaa9-dc9f-4396-8d5f-8c081fb06d67)

https://git.kernel.org/stable/c/c3cee924bd855184d15bc4aa6088dcf8e2c1394c(416baaa9-dc9f-4396-8d5f-8c081fb06d67)

Correlations IOC

Aucune correlation enregistree

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