CVE-2022-50232

MEDIUM EPSS 6.5%
Published Jun 18, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jun 18, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
6.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 2

VendorProductVersionRange
linuxlinux_kernel*≥5.13  –  <5.15.60
linuxlinux_kernel*≥5.16  –  <6.0

References 2

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

Remediation

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