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 19216.532.3

medium Tenable Self-Hosted Container Security Plugin ID 468732

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 potential deadlock in
write-through mode Fix netfs_advance_writethrough() to always unlock the supplied folio and to mark it
dirty if it isn't yet written to the end. Unfortunately, it can't be marked for writeback until the folio
is done with as that may cause a deadlock against mmapped reads and writes. Even though it has been marked
dirty, premature writeback can't occur as the caller is holding both inode->i_rwsem (which will prevent
concurrent truncation, fallocation, DIO and other writes) and ictx->wb_lock (which will cause flushing to
wait and writeback to skip or wait). Note that this may be easier to deal with once the queuing of folios
is split from the generation of subrequests. (CVE-2026-64062)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19216.532.3 or later.

Plugin Details

Severity: Medium

ID: 468732

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: Low

Score: 3

Percentile: 23.64

Vendor

Vendor Severity: MEDIUM

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2026-64062

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: 6/4/2026

Reference Information

CVE: CVE-2026-64062

Detections

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