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.
- Score
- CVSS 3.1 5.5 Medium
- Status
- Analyzed - 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- Published
- 2025-06-18
- Last modified
- 2026-05-11
Affected products
References
- https://git.kernel.org/stable/c/775871d4be0d75e219cca937af843a4a1b60489a
- https://git.kernel.org/stable/c/c3cee924bd855184d15bc4aa6088dcf8e2c1394c
