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 19506.224.7

medium Tenable Self-Hosted Container Security Plugin ID 469846

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: net/mlx5: Fix deadlock between devlink
lock and esw->wq esw->work_queue executes esw_functions_changed_event_handler ->
esw_vfs_changed_event_handler and acquires the devlink lock. .eswitch_mode_set (acquires devlink lock in
devlink_nl_pre_doit) -> mlx5_devlink_eswitch_mode_set -> mlx5_eswitch_disable_locked ->
mlx5_eswitch_event_handler_unregister -> flush_workqueue deadlocks when esw_vfs_changed_event_handler
executes. Fix that by no longer flushing the work to avoid the deadlock, and using a generation counter to
keep track of work relevance. This avoids an old handler manipulating an esw that has undergone one or
more mode changes: - the counter is incremented in mlx5_eswitch_event_handler_unregister. - the counter is
read and passed to the ephemeral mlx5_host_work struct. - the work handler takes the devlink lock and
bails out if the current generation is different than the one it was scheduled to operate on. -
mlx5_eswitch_cleanup does the final draining before destroying the wq. No longer flushing the workqueue
has the side effect of maybe no longer cancelling pending vport_change_handler work items, but that's ok
since those are disabled elsewhere: - mlx5_eswitch_disable_locked disables the vport eq notifier. -
mlx5_esw_vport_disable disarms the HW EQ notification and marks vport->enabled under state_lock to false
to prevent pending vport handler from doing anything. - mlx5_eswitch_cleanup destroys the workqueue and
makes sure all events are disabled/finished. (CVE-2026-43468)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.224.7 or later.

Plugin Details

Severity: Medium

ID: 469846

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: Low

Score: 3

Percentile: 23.75

Vendor

Vendor Severity: LOW

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-2026-43468

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: 4/30/2026

Reference Information

CVE: CVE-2026-43468

Detections

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