Race condition in Linux kernel - CVE-2026-46147
Published: May 29, 2026
Vulnerability identifier: #VU133044
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-362
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 synchronization in register_hyp_vcpu() and pkvm_load_hyp_vcpu() when publishing and loading vCPU pointers during vCPU initialization. A local user can trigger concurrent access to cause a denial of service.
A concurrent reader may observe a partially initialized hyp_vcpu object.
How to mitigate CVE-2026-46147
Install security update from vendor's repository.