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 20085.0.0

high Tenable Self-Hosted Container Security Plugin ID 471446

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: xfrm: clear mode callbacks after
failed mode setup xfrm_state_gc_task can run long after a failed IPTFS state setup. In the reproduced
case, __xfrm_init_state() cached x->mode_cbs, IPTFS setup returned -ENOMEM before publishing mode_data,
and the temporary module reference from xfrm_get_mode_cbs() was dropped immediately. The dead state then
kept x->mode_cbs until deferred GC ran after xfrm_iptfs had been unloaded. Clear x->mode_cbs when mode
init or clone fails before publishing mode_data. Those states never installed mode-specific state or the
long-term IPTFS module pin, so deferred GC has nothing mode-specific to destroy and must not retain a
callback table pointer past the temporary lookup reference. The buggy scenario involves two paths, with
each column showing the order within that path: failed setup path: 1. cache x->mode_cbs 2. mode setup
fails before mode_data 3. drop the temporary module ref 4. dead state keeps x->mode_cbs cached GC/unload
path: 1. xfrm_state_put() queues GC work 2. xfrm_iptfs unloads later 3. xfrm_state_gc_task runs 4. GC
dereferences stale x->mode_cbs This also covers the failed clone path where clone_state() returns before
publishing mode_data. Validation reproduced this kernel report: Kernel panic - not syncing: Fatal
exception CONFIG_FAULT_INJECTION_STACKTRACE_FILTER=y failslab_stacktrace_filter matched xfrm_iptfs frames
ack_error=-12 FAULT_INJECTION: forcing a failure BUG: unable to handle page fault Workqueue: events
xfrm_state_gc_task RIP: xfrm_state_gc_task+0x142/0x650 Modules linked in: esp4_offload xfrm_user [last
unloaded: xfrm_iptfs] Kernel panic - not syncing: Fatal exception (CVE-2026-68415)

Solution

Update the sys-kernel/cchost-kernel-6_18 library and its related packages to version 20085.0.0 or later.

Plugin Details

Severity: High

ID: 471446

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: 58.15

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-2026-68415

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: 8/10/2026

Reference Information

CVE: CVE-2026-68415

Detections

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