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 19506.224.7

high Tenable Cloud Security Plugin ID 469648

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: dm-thin: fix metadata refcount
underflow There's a bug in dm-thin in the function rebalance_children. If the internal btree node has one
entry, the code tries to copy all btree entries from the node's child to the node itself and then
decrement the child's reference count. If the child node is shared (it has reference count > 1), we won't
free it, so there would be two pointers to each of the grandchildren nodes. But the reference counts of
the grandchildren is not increased, thus the reference count doesn't match the number of pointers that
point to the grandchildren. This results in "device mapper: space map common: unable to decrement block"
errors. Fix this bug by incrementing reference counts on the grandchildren if the btree node is shared.
(CVE-2026-46107)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.224.7 or later.

Plugin Details

Severity: High

ID: 469648

Version: Revision 1.3

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/3/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.27

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-2026-46107

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: 5/26/2026

Reference Information

CVE: CVE-2026-46107

Detections

Analytics