Google: sys-kernel/cchost-kernel-6_12, sys-kernel/cchost-kernel-6_18, sys-kernel/csql-kernel-6_12, sys-kernel/csql-kernel-6_18, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-kernel-6_18, sys-kernel/lakitu-nc-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_18: security update to 19999.44.106

medium Tenable Cloud Security Plugin ID 475441

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: tick/broadcast: Plug clockevents
replacement race 朱恺乾 reported and decoded the following race condition when a broadcast device is
replaced: CPUA CPUB __tick_broadcast_oneshot_control() bc = tick_broadcast_device.evtdev;
tick_install_broadcast_device(dev) clockevents_exchange_device(cur, dev) shutdown(cur); detach(cur);
cur->handler = noop; tick_broadcast_device.evtdev = dev; tick_broadcast_set_event(bc, next_event); <-
FAIL: arms a detached device. If the original broadcast device has a restricted interrupt affinity mask
and the last CPU in that mask goes offline then the BUG() in tick_cleanup_dead_cpu() triggers because the
clockevent device is not in detached state. The reason for this is that tick_install_broadcast_device() is
not serialized vs. tick broadcast operations. The obvious cure is to serialize
tick_install_broadcast_device() with tick_broadcast_lock against a concurrent tick broadcast operation.
That requires to split clockevents_exchange_device() into two parts, one which does the exchange, shutdown
and detach operation and the other which drops the module reference count. This is required because the
module reference cannot be dropped while holding tick_broadcast_lock. Let clockevents_exchange_device() do
both operations as before, but let the broadcast device code take the two step approach and do the device
exchange under tick_broadcast_lock and drop the module reference count after releasing it.
(CVE-2026-97925)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19999.44.106 or later.

Plugin Details

Severity: Medium

ID: 475441

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/16/2026

Updated: 10/16/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.63

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-97925

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/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: 9/25/2026

Reference Information

CVE: CVE-2026-97925

Detections

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