PT-2026-44270 · Linux · Linux Kernel

Published 2026-05-28 · Updated 2026-06-10 · CVE-2026-46147

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description Two issues exist in the vCPU initialization path of the KVM arm64 component. First, a failure occurring after hyp pin shared mem() succeeds can lead to a pin leak, where pin references on the host vCPU and SVE state pages are permanently leaked because the cleanup path fails to call unpin host vcpu() or unpin host sve state(). Second, the register hyp vcpu() function publishes the new vCPU pointer into hyp vm->vcpus[] using a bare store. This allows a concurrent caller of pkvm load hyp vcpu() to potentially observe a partially initialized vCPU object due to improper memory ordering.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

CVE-2026-46147

OPENSUSE-SU-2026:10954-1

Affected Products

Linux Kernel

References · 289

• https://osv.dev/vulnerability/BELL-CVE-2026-46147 · Vendor Advisory
• https://git.kernel.org/stable/c/7d3c27b54253cda91dc4d2c1bfc109c490837ab9 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-46147 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-46147 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-46147 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:10954-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-46147 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46147 · Vendor Advisory
• https://git.kernel.org/stable/c/73b9c1e5da84cd69b1a86e374e450817cd051371 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-46147 · Security Note
• https://git.kernel.org/stable/c/6d69c0ed978f7f0efd053fc98390f25ab77c1aea · Patch
• https://suse.com/security/cve/CVE-2026-46209 · Note
• https://suse.com/security/cve/CVE-2026-46129 · Note
• https://suse.com/security/cve/CVE-2026-46067 · Note
• https://suse.com/security/cve/CVE-2026-46140 · Note