Improper access control in Linux kernel - CVE-2026-43096
Published: May 7, 2026
Vulnerability identifier: #VU130656
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43096
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 cause a denial of service.
The vulnerability exists due to improper access control in mshv_handle_gpa_intercept() when handling guest memory access intercepts on movable memory regions. A local user can trigger writes to non-writable regions or executes to non-executable regions to cause a denial of service.
The issue can cause the vCPU to enter an infinite fault loop and consume host resources.
How to mitigate CVE-2026-43096
Install security update from vendor's repository.