Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_12: security update to 19506.299.82

high Tenable Self-Hosted Container Security Plugin ID 468971

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: x86: Ensure vendor's exit handler
runs before fastpath userspace exits Move the handling of fastpath userspace exits into vendor code to
ensure KVM runs vendor specific operations that need to run before userspace gains control of the vCPU.
E.g. for VMX (and soon to be for SVM as well), KVM needs to flush the PML buffer prior to exiting to
userspace, otherwise any memory written by the final KVM_RUN might never be flagged as dirty. Note,
waiting to snapshot CR0 and CR3 until svm_handle_exit() is flawed in general, as that risks consuming
stale state in a fastpath handler. That will be addressed in a future change. (CVE-2026-64284)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.299.82 or later.

Plugin Details

Severity: High

ID: 468971

Version: Revision 1.5

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/6/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.6

Vendor

Vendor Severity: HIGH

CVSS v2

Risk Factor: Medium

Base Score: 6.2

Temporal Score: 4.6

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

CVSS Score Source: CVE-2026-64284

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.2

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/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: 7/23/2026

Reference Information

CVE: CVE-2026-64284

Detections

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