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 19506.120.97

high Tenable Self-Hosted Container Security Plugin ID 469692

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: sched_ext: Remove redundant css_put()
in scx_cgroup_init() The iterator css_for_each_descendant_pre() walks the cgroup hierarchy under
cgroup_lock(). It does not increment the reference counts on yielded css structs. According to the cgroup
documentation, css_put() should only be used to release a reference obtained via css_get() or
css_tryget_online(). Since the iterator does not use either of these to acquire a reference, calling
css_put() in the error path of scx_cgroup_init() causes a refcount underflow. Remove the unbalanced
css_put() to prevent a potential Use-After-Free (UAF) vulnerability. (CVE-2026-43438)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.120.97 or later.

Plugin Details

Severity: High

ID: 469692

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: 57.87

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-2026-43438

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: 4/30/2026

Reference Information

CVE: CVE-2026-43438

Detections

Analytics