CVE-2022-50232

Advisory lineage Upstream: 0 Downstream: 6
Analyzed
Published: 18 Jun 2025, 11:04
Last modified:11 May 2026, 19:15

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.07% LOW
0% probability +0.05%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

18 Jun 2025, 11:04
Published
Vulnerability first disclosed
11 May 2026, 19:15
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.07%• Percentile: 22%

Affected Systems

  • linux•linux

    ≥ 18107f8a2df6bf1c6cac8d0713f757f866d5af51, < 775871d4be0d75e219cca937af843a4a1b60489a | ≥ 18107f8a2df6bf1c6cac8d0713f757f866d5af51, < c3cee924bd855184d15bc4aa6088dcf8e2c1394c | 5.13

  • linux•linux_kernel

    ≥ 5.13, < 5.15.60 | ≥ 5.16, < 6.0

References (2)