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

critical Tenable Self-Hosted Container Security Plugin ID 471190

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: netfs: Fix cancellation of a DIO and
single read subrequests When the preparation of a new subrequest for a read fails, if the subrequest has
already been added to the stream->subrequests list, it can't simply be put and abandoned as the collector
may see it. Also, if it hasn't been queued yet, it has two outstanding refs that both need to be put. Both
DIO read and single-read dispatch fail at this; further, both differ in the order they do things to the
way buffered read works. Fix cancellation of both DIO-read and single-read subrequests that failed
preparation by the following steps: (1) Harmonise all three reads (buffered, dio, single) to queue the
subreq before prepping it. (2) Make all three call netfs_queue_read() to do the queuing. (3) Set
NETFS_RREQ_ALL_QUEUED independently of the queuing as we don't know the length of the subreq at this
point. (4) In all cases, set the error and NETFS_SREQ_FAILED flag on the subreq and then call
netfs_read_subreq_terminated() to deal with it. This will pass responsibility off to the collector for
dealing with it. (CVE-2026-64069)

Solution

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

Plugin Details

Severity: Critical

ID: 471190

Version: Revision 1.6

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: 4.9

Percentile: 58.12

Vendor

Vendor Severity: HIGH

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-64069

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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: 6/22/2026

Reference Information

CVE: CVE-2026-64069

Detections

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