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 20162.0.0

high Tenable Self-Hosted Container Security Plugin ID 475703

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: sunrpc: route to a populated pool in
svc_pool_for_cpu() svc_set_num_threads() spreads the requested threads evenly across the service's pools
(base = nrservs / sv_nrpools). When a service runs fewer threads than it has pools -- e.g. an nfsd
configured with fewer threads than the host has NUMA nodes while running in "pernode" or "percpu" mode --
the trailing pools are left with no threads at all. svc_xprt_enqueue() selects a pool from the CPU
servicing the transport, queues the transport on that pool's sp_xprts, and only wakes a thread from the
same pool. Each thread services exclusively its own pool, so a transport that lands on a threadless pool
is enqueued on sp_xprts and never picked up: the connection hangs indefinitely. Have svc_pool_for_cpu()
skip pools that currently have no threads, falling back to the next populated pool. This trades NUMA
locality for a guarantee that the work is actually serviced. sp_nrthreads is only updated under the
service mutex; the lockless read here is a best-effort routing hint, so annotate it with data_race().
(CVE-2026-89549)

Solution

Update the sys-kernel/cchost-kernel-6_18 library and its related packages to version 20162.0.0 or later.

Plugin Details

Severity: High

ID: 475703

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: 23.58

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-89549

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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: 9/11/2026

Reference Information

CVE: CVE-2026-89549

Detections

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