Detections
Analytics

Google: sys-kernel/cchost-kernel-6_18, sys-kernel/csql-kernel-6_18, sys-kernel/lakitu-kernel-6_18, sys-kernel/lakitu-nc-kernel-6_18: security update to 19862.0.0

high Tenable Cloud Security Plugin ID 470952

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Disable AVIC IPI
 virtualization on Hygon Family 18h (erratum #1235) Hygon Family 18h CPUs are derived from AMD Family 17h
 (Zen1) silicon and share the same erratum #1235: hardware may read a stale IsRunning=1 bit during ICR
 write emulation and silently fail to generate an AVIC_IPI_FAILURE_TARGET_NOT_RUNNING VM-Exit on the
 sending vCPU. The absence of the VM-Exit causes KVM to miss the required wakeup of blocking target vCPUs,
 leading to hung vCPUs and unbounded delays in guest execution. Extend the existing AMD Family 17h erratum
 #1235 workaround to also cover Hygon Family 18h. With IPI virtualization disabled, KVM never sets
 IsRunning=1 in the Physical ID table, so every non-self IPI generates a VM-Exit and is correctly emulated.
 (CVE-2026-64172)

Solution

Update the sys-kernel/cchost-kernel-6_18 library and its related packages to version 19862.0.0 or later.

See Also

https://storage.googleapis.com/cos-oval-vulnerability-feed/cos-133.oval.xml.tar.gz

Plugin Details

Severity: High

ID: 470952

Version: Revision 1.6

Type: Local

Published: 10/3/2026

Updated: 10/6/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3.3

Percentile: 51.15

Vendor

Vendor Severity: HIGH

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-64172

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.2

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 6/22/2026

Reference Information

CVE: CVE-2026-64172