CVE-2026-64287

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-64287

Key Details

CVE	CVE-2026-64287
CVSS Score / Version	8.2 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is high; 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: Bound used_lrs when flushing the pKVM hyp vCPU

flush_hyp_vcpu() copies the host vGIC state into the hyp's private vCPU

on every run. The vGIC list register save and restore use used_lrs as

their loop bound and expect it to stay within the number of implemented

list registers. While this is generally the case, flush_hyp_vcpu()

copies vgic_v3 verbatim and does not enforce this, so a value provided

by the host is used at EL2 to index vgic_lr[] and access ICH_LR<n>_EL2

(host -> EL2).

Fix by clamping used_lrs to the number of implemented list registers

after the copy, as the trusted path already does in

vgic_flush_lr_state(). The number of implemented list registers is

constant after init, so it is replicated once from

kvm_vgic_global_state.nr_lr into hyp_gicv3_nr_lr rather than read on

every entry. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-64287
CVE	https://www.cve.org/CVERecord?id=CVE-2026-64287

Source

Reference

NVD

CVE