Improper access control in Linux kernel - CVE-2026-53200
Published: June 26, 2026
Vulnerability identifier: #VU135586
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-53200
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to bypass execute permission restrictions.
The vulnerability exists due to improper access control in KVM arm64 nested virtualization translation handling when processing XN bits on systems without FEAT_XNX. A local user can manipulate a nested translation state to bypass execute permission restrictions.
The issue occurs because XN[0] is handled incorrectly when FEAT_XNX is not supported, which can result in execute permissions being granted unconditionally.
How to mitigate CVE-2026-53200
Install security update from vendor's repository.