Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12: security update to 19216.220.9

critical Tenable Self-Hosted Container Security Plugin ID 472432

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: veth: reduce XDP no_direct return
section to fix race As explain in commit fa349e396e48 ("veth: Fix race with AF_XDP exposing old or
uninitialized descriptors") for veth there is a chance after napi_complete_done() that another CPU can
manage start another NAPI instance running veth_pool(). For NAPI this is correctly handled as the
napi_schedule_prep() check will prevent multiple instances from getting scheduled, but for the remaining
code in veth_pool() this can run concurrent with the newly started NAPI instance. The problem/race is that
xdp_clear_return_frame_no_direct() isn't designed to be nested. Prior to commit 401cb7dae813 ("net:
Reference bpf_redirect_info via task_struct on PREEMPT_RT.") the temporary BPF net context
bpf_redirect_info was stored per CPU, where this wasn't an issue. Since this commit the BPF context is
stored in 'current' task_struct. When running veth in threaded-NAPI mode, then the kthread becomes the
storage area. Now a race exists between two concurrent veth_pool() function calls one exiting NAPI and one
running new NAPI, both using the same BPF net context. Race is when another CPU gets within the
xdp_set_return_frame_no_direct() section before exiting veth_pool() calls the clear-function
xdp_clear_return_frame_no_direct(). (CVE-2025-68341)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19216.220.9 or later.

Plugin Details

Severity: Critical

ID: 472432

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: 58.12

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2025-68341

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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: 12/23/2025

Reference Information

CVE: CVE-2025-68341

Detections

Analytics