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 19216.655.6

high Tenable Self-Hosted Container Security Plugin ID 468744

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 incorrect
altmap passing in error path In create_altmaps_and_memory_blocks(), when arch_add_memory() succeeds with
memmap_on_memory enabled, the vmemmap pages are allocated from params.altmap. If
create_memory_block_devices() subsequently fails, the error path calls arch_remove_memory() with a NULL
altmap instead of params.altmap. This is a bug that could lead to memory corruption. Since altmap is NULL,
vmemmap_free() falls back to freeing the vmemmap pages into the system buddy allocator via free_pages()
instead of the altmap. arch_remove_memory() then immediately destroys the physical linear mapping for this
memory. This injects unowned pages into the buddy allocator, causing machine checks or memory corruption
if the system later attempts to allocate and use those freed pages. Fix this by passing params.altmap to
arch_remove_memory() in the error path. (CVE-2026-72212)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19216.655.6 or later.

Plugin Details

Severity: High

ID: 468744

Version: Revision 1.2

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: 58.16

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-72212

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: 8/11/2026

Reference Information

CVE: CVE-2026-72212

Detections

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