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 19804.0.0

medium Tenable Self-Hosted Container Security Plugin ID 471063

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: mm/mempolicy: fix memory leaks in
weighted_interleave_auto_store() weighted_interleave_auto_store() fetches old_wi_state inside the if
(!input) block only. This causes two memory leaks: 1. When a user writes "false" and the current mode is
already manual, the function returns early without freeing the freshly allocated new_wi_state. 2. When a
user writes "true", old_wi_state stays NULL because the fetch is skipped entirely. The old state is then
overwritten by rcu_assign_pointer() but never freed, since the cleanup path is gated on old_wi_state being
non-NULL. A user can trigger this repeatedly by writing "1" in a loop. Fix both leaks by moving the
old_wi_state fetch before the input check, making it unconditional. This also allows a unified early
return for both "true" and "false" when the requested mode matches the current mode. Reviewed by: Donet
Tom <[email protected]> (CVE-2026-46042)

Solution

Update the sys-kernel/cchost-kernel-6_18 library and its related packages to version 19804.0.0 or later.

Plugin Details

Severity: Medium

ID: 471063

Version: Revision 1.5

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: Low

Score: 3

Percentile: 23.76

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2026-46042

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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: 5/26/2026

Reference Information

CVE: CVE-2026-46042

Detections

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