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 19506.549.7

high Tenable Cloud Security Plugin ID 475214

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: bridge: mst: move switchdev call
outside rcu This is a follow-up of one of sashiko's pre-existing bug reports. br_mst_set_state() calls
switchdev_port_attr_set() for nonzero MSTIs while holding rcu_read_lock() which invokes the blocking
switchdev notifier chain and may sleep. Nonzero MSTI changes come from netlink with rtnl held. Move the
switchdev call before entering the rcu section and assert that rtnl is held. The call cannot be deferred
because netlink needs its error and extack. Also DSA reads the old bridge MST state during the callback
and checks it. A deferred callback will be late and will see the updated state. (CVE-2026-98301)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.549.7 or later.

Plugin Details

Severity: High

ID: 475214

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: 23.71

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-2026-98301

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/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: 10/6/2026

Reference Information

CVE: CVE-2026-98301

Detections

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