Improper resource shutdown or release in Linux kernel - CVE-2026-46147
Published: May 29, 2026
Vulnerability identifier: #VU133043
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-2026-46147
CWE-ID: CWE-404
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 resource shutdown or release in __pkvm_init_vcpu() when initializing a vCPU after shared memory has been pinned and a subsequent check fails. A local user can trigger the error path to cause a denial of service.
The issue can permanently leak pin references on the host vCPU and SVE state pages.
How to mitigate CVE-2026-46147
Install security update from vendor's repository.