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 19506.299.3

medium Tenable Cloud Security Plugin ID 472254

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/memory_hotplug: fix memory block
reference leak on remove Patch series "mm: Fix memory block leaks and locking", v2. This series fixes two
memory block device reference leaks and one locking issue around the per-memory_block hwpoison counter.
This patch (of 2): remove_memory_blocks_and_altmaps() looks up each memory block with find_memory_block(),
which acquires a reference to the memory block device. That reference is never dropped on this path,
resulting in a leaked device reference when removing memory blocks and their altmaps. Drop the reference
after retrieving mem->altmap and clearing mem->altmap, before removing the memory block device.
(CVE-2026-64180)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.299.3 or later.

Plugin Details

Severity: Medium

ID: 472254

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/3/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.58

Vendor

Vendor Severity: MEDIUM

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-2026-64180

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: 6/4/2026

Reference Information

CVE: CVE-2026-64180

Detections

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