SB20260720125 - Improper resource shutdown or release in Linux kernel arm64 kvm

Description

This security bulletin contains information about 1 vulnerability.

1) Improper resource shutdown or release (CVE-ID: CVE-2026-64105)

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

CVSSv4: 6.8 [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]

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/173fb86e5519dbe7aabed1f5fa7456152a4a2e38
• https://git.kernel.org/stable/c/7023900b4988fb6f4a59d304d878003ff562e98d
• https://git.kernel.org/stable/c/e690caa54a6139d98495ac69626807623520babd
• https://git.kernel.org/stable/c/f19c354dbd457759dfcf1195ab4bdba2bb568323