CVE-2026-64555

Last refreshed2026-11-03

Status: UPDATED | Advisory ID: CVE-2026-64555

Key Details

CVE	CVE-2026-64555
CVSS Score / Version	8.8 (High) / CVSS v3.1
Updated	2026-11-03
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is changed; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

In the Linux kernel, the following vulnerability has been resolved:

KVM: arm64: nv: Fix SPSR_EL2 restore in kvm_hyp_handle_mops()

kvm_hyp_handle_mops() resets the single-step state machine as part of

rewinding state for a MOPS exception by modifying vcpu_cpsr() and

writing the result directly into hardware.

In the case of nested virtualization, vcpu_cpsr() is a synthetic value

such that the rest of KVM can deal with vEL2 cleanly. That means the

value requires translation before being written into hardware, which is

unfortunately missing from the MOPS handler.

Fix it by directly modifying SPSR_EL2 and avoiding the synthetic state

altogether, which will be resynchronized on the next 'full' exit back

to KVM. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-64555
CVE	https://www.cve.org/CVERecord?id=CVE-2026-64555

Source

Reference

NVD

CVE