Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_6: security update to 19216.395.4

high Tenable Cloud Security Plugin ID 472080

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: netfilter: flowtable: strictly check
for maximum number of actions The maximum number of flowtable hardware offload actions in IPv6 is: *
ethernet mangling (4 payload actions, 2 for each ethernet address) * SNAT (4 payload actions) * DNAT (4
payload actions) * Double VLAN (4 vlan actions, 2 for popping vlan, and 2 for pushing) for QinQ. *
Redirect (1 action) Which makes 17, while the maximum is 16. But act_ct supports for tunnels actions too.
Note that payload action operates at 32-bit word level, so mangling an IPv6 address takes 4 payload
actions. Update flow_action_entry_next() calls to check for the maximum number of supported actions. While
at it, rise the maximum number of actions per flow from 16 to 24 so this works fine with IPv6 setups.
(CVE-2026-43329)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19216.395.4 or later.

Plugin Details

Severity: High

ID: 472080

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/3/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.94

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-43329

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: 5/8/2026

Reference Information

CVE: CVE-2026-43329

Detections

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