Improper resource shutdown or release in Linux kernel - CVE-2026-64105
Published: July 20, 2026
Vulnerability identifier: #VU138537
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-2026-64105
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 management in kvm_vgic_vcpu_init error handling in arch/arm64/kvm/arm.c when creating a virtual CPU and initialization fails after private IRQ allocation. A local user can trigger a failed virtual CPU creation sequence to cause a denial of service.
The issue occurs when redistributor iodev registration fails after private IRQs have already been allocated.
How to mitigate CVE-2026-64105
Install security update from vendor's repository.